DUPLA - Calibration solution pH 4, 100 ml
Puffed calibration with the null points of Dupla pH-Control with the Dupla pH-Electrode.
Can also be used for calibrating other PH electrodes.

Do you want to...
Brand
Stock status of products
Product is in stock
You can see this on the product page, above the price of the product. Here you will always find the most current stock status of the product. If your order consists entirely of products that are available from stock, your order will be packed and shipped immediately.Pick up stock product
You must place the order online and choose pick up. Your order will then be prepared for you. As soon as it is ready to be picked up, you will receive a notification by e-mail and/or SMS.A pick-up order placed before 14:00 is usually ready to be picked up the same day.
Shipping costs to other EU countries
Country | Envelope (max. 2 kg) | Parcel (max. 30 kg) | Pallet (max. 500 kg) | Free shipping above |
---|---|---|---|---|
Afghanistan | Price on request | € 125.00 | Price on request | € 2000 |
Albania | Price on request | € 48.00 | Price on request | € 1000 |
Algeria | Price on request | € 69.00 | Price on request | € 1500 |
Andorra | Price on request | € 49.00 | Price on request | € 2000 |
Angola | Price on request | € 109.00 | Price on request | No free shipping |
Anguilla | Price on request | € 139.00 | Price on request | No free shipping |
Argentina | Price on request | € 69.00 | Price on request | No free shipping |
Armenia | Price on request | € 69.00 | Price on request | No free shipping |
Aruba | Price on request | € 59.99 | Price on request | No free shipping |
Australia | € 12.99 | € 89.00 | € 12.99 | No free shipping |
Austria | Price on request | € 19.99 | Price on request | € 500.00 |
Azerbaijan | Price on request | € 129.00 | Price on request | No free shipping |
Bangladesh | Price on request | € 76.76 | Price on request | No free shipping |
Belarus | Price on request | € 29.99 | Price on request | No free shipping |
Belgie | € 7.95 | € 7.95 | € 75.00 | € 50.00 |
Brazil | Price on request | € 89.00 | Price on request | No free shipping |
Bulgaria | Price on request | € 32.49 | Price on request | No free shipping |
Canada | € 14.99 | € 75.00 | Price on request | No free shipping |
Chile | Price on request | € 231.349 | Price on request | No free shipping |
China | Price on request | € 49.00 | Price on request | € 5000.00 |
Costa Rica | Price on request | € 69.00 | Price on request | No free shipping |
Croatia | Price on request | € 29.00 | Price on request | € 500.00 |
Cyprus | Price on request | € 65.00 | Price on request | No free shipping |
Czech Republic | Price on request | € 23.49 | Price on request | No free shipping |
Denmark | Price on request | € 35.99 | Price on request | No free shipping |
England | € null | € 35.00 | € null | No free shipping |
Estonia | Price on request | € 27.99 | Price on request | € 1000.00 |
Fiji | Price on request | € 125.00 | Price on request | No free shipping |
Finland | Price on request | € 39.99 | Price on request | No free shipping |
France | € 7.99 | € 25.99 | Price on request | € 250.00 |
Germany | € 2.95 | € 14.99 | Price on request | € 250.00 |
Greece | Price on request | € 32.99 | Price on request | No free shipping |
Hong Kong | € 89.00 | € 89.00 | € 89.00 | No free shipping |
Hungary | Price on request | € 25.00 | Price on request | No free shipping |
Iceland | Price on request | € 59.99 | Price on request | No free shipping |
India | Price on request | € 109.00 | Price on request | No free shipping |
Indonesia | Price on request | € 79.00 | Price on request | No free shipping |
Ireland | Price on request | € 27.49 | Price on request | No free shipping |
Israel | Price on request | € 125.00 | Price on request | No free shipping |
Italy | € 10.00 | € 19.99 | Price on request | € 500.00 |
Japan | Price on request | € 125.00 | Price on request | No free shipping |
Jordan | Price on request | € 59.00 | Price on request | No free shipping |
Kuwait | Price on request | € 49.00 | Price on request | No free shipping |
Latvia | Price on request | € 26.99 | Price on request | No free shipping |
Lebanon | Price on request | € 99.00 | Price on request | No free shipping |
Lithuania | Price on request | € 24.99 | Price on request | No free shipping |
Luxembourg | Price on request | € 19.50 | € 149.99 | € 100.00 |
Malaysia | Price on request | € 59.00 | Price on request | No free shipping |
Malta | Price on request | € 75.00 | Price on request | No free shipping |
Mauritania | Price on request | € 99.00 | Price on request | No free shipping |
Mauritius | Price on request | € 79.00 | Price on request | No free shipping |
Mexico | Price on request | € 129.00 | Price on request | No free shipping |
Moldova | Price on request | € 79.00 | Price on request | No free shipping |
Montenegro | Price on request | € 79.00 | Price on request | No free shipping |
Morocco | Price on request | € 199.00 | Price on request | No free shipping |
Nederland | € 3.89 | € 6.99 | € 60.00 | € 50.00 |
New Zealand | Price on request | € 137.79 | Price on request | No free shipping |
North Korea | Price on request | € 189.00 | Price on request | No free shipping |
North Macedonia | Price on request | € 49.00 | Price on request | No free shipping |
Norway | € 19.00 | € 59.00 | € 19.00 | No free shipping |
Philippines | Price on request | € 69.00 | Price on request | No free shipping |
Poland | Price on request | € 15.99 | Price on request | € 300.00 |
Portugal | € 12.99 | € 29.99 | € 299.99 | € 5000.00 |
Qatar | Price on request | € 149.00 | Price on request | No free shipping |
Romania | Price on request | € 22.99 | Price on request | No free shipping |
Russia | Price on request | € 149.99 | Price on request | No free shipping |
Saudi Arabia | Price on request | € 69.99 | Price on request | No free shipping |
Serbia | Price on request | € 64.99 | Price on request | No free shipping |
Seychelles | Price on request | € 79.99 | Price on request | No free shipping |
Singapore | € 14.99 | € 39.00 | € 14.99 | No free shipping |
Slovakia | Price on request | € 27.99 | Price on request | No free shipping |
Slovenia | Price on request | € 24.99 | Price on request | No free shipping |
South Africa | Price on request | € 129.00 | Price on request | No free shipping |
South Korea | Price on request | € 99.00 | Price on request | No free shipping |
Spain | Price on request | € 27.99 | Price on request | No free shipping |
Sweden | Price on request | € 32.99 | Price on request | No free shipping |
Switzerland | Price on request | € 49.99 | Price on request | No free shipping |
Thailand | Price on request | € 59.00 | Price on request | No free shipping |
Turkey | Price on request | € 79.00 | Price on request | No free shipping |
Uganda | Price on request | € 75.00 | Price on request | No free shipping |
Ukraine | € 9.99 | € 49.00 | € 9.99 | No free shipping |
United Arab Emirates | Price on request | € 79.00 | Price on request | No free shipping |
United Kingdom | Price on request | € 35.00 | Price on request | No free shipping |
United States | € 35.00 | € 79.00 | Price on request | No free shipping |
Uzbekistan | Price on request | € 129.00 | Price on request | No free shipping |
Vietnam | Price on request | € 79.00 | Price on request | No free shipping |
Shipment
-
Above € 50,- free delivery in NL & BEFree delivery in NL & BEIn stock Ordered before 16:00, shipped today *No stock Notify me when this product is in stockThere is a minimum of 24 hours between the time of ordering and shipping due to the extra care for correct packaging and shipping. For corals additional packaging and shipping charges apply.



Ocean Store


Ocean Store is a modern webshop with a large selection of reef aquarium equipment, supplements and food for your (marine) aquarium. We excel in reachability, service and speed. Not only in delivery of your ordered goods, but also in the adequate answering of your (marine) aquarium related questions. We are happy to share our passion for reef aquariums with you!
Open: Available Monday / Friday 9:00-20:00
Phone: +31(0)78-6456669
€ 0.99 - € 2999.99
EUR
479190
-
DUPLA - Calibration solution pH 4, 100 ml
Puffed calibration with the null points of Dupla pH-Control with the Dupla pH-Electrode. Can also be used for calibrating other PH electrodes.... In stock€ 7.99
Dupla-eeze Calanus, 2-3mm, 20g
HO-80658 Double-eeze Calanus, 2-3mm, 20 g ...
Dupla-eeze Calanus Powder, 60 g
HO-81703 Double-eeze Calanus Powder, 60 g ...
DUPLA Coral Food phyto for corals and invertebrates
DU-81706 Floating food and plankton replacement for corals, filter feeders and mussels. Coral Food phyto is a supplementary food for small and large polyp stony corals and for all other plankton filter feeders.
DUPLA Dosing Box C4 4 x 1.5 l / container
DU-82610 A handy reservoir for storing 4 dosing solutions. The individual chambers of the Dupla Marin Dosing Box C4 each have a capacity of 1.5 litres and at the same time serve to control the...
DUPLA Duplamatic automatic vehicle
DU-80930-2 The DuplaMatic is a modern microchip-controlled feeder, which is particularly user-friendly thanks to its simple application and programming. Thanks to the optional operation with the aid of a ge...
Feed drum for DUPLA Duplamatic feeder
DU-80931 Extension set for the feed drum for the automatic feed of DuplaMatic. If you need a little more, the filling volume of the DuplaMatic can be increased from 60 ml to 100 ml with an additional filling drum.
DUPLA Duresin RI, Ultrapure water resin 1000 ml
DU-80561 Binds silicates, nitrates and residual salts in the permeate (pure water from the reverse osmosis system). The colour indicator shows how far the material is depleted. Is a ready-to-use mixture...
DUPLA Worm X (Trap for bristle worms)
DU-81595 There is no saltwater aquarium in which bristle worms do not occur. They are usually secretive and often only come out at night or when they are looking for food. If you see ticks...
DUPLA Jod 24, 50 ml
DU-81334 Essential trace element iodine for daily dosage. Necessary for the development and coloration of corals. Indispensable for the molting of crustaceans. Important for many algae species. ...
DUAL - Biopellets NP
DU-81517 Biopellets NP is an easy to use filter material for removing phosphate and nitrate in marine aquariums. The Biopellets NP, made of 100% biodegradable polymers, form ...
DUPLA - Calibration solution pH 7, 100 ml
DU-80405 Puffed calibration with the null points of Dupla pH-Control with the Dupla pH-Electrode. Can also be used for calibrating other PH electrodes....
DUPLA - All 4 One liquid 1.000 ml
DU-81318 All 4 One Liquid is the all-round product for all reef aquariums. It provides the aquarium with magnesium, calcium, strontium, carbonate hardness formers and all other necessary minerals and trace elements.
DUPLA - Siliphos
DU-81380 Siliphos is an iron hydroxide based, effective phosphate and silicate remover for marine and freshwater aquariums. The wet granulate has an extremely high binding capacity and solves algae problems.
DUPLA - Empty filter housing FG 500
DU-80500 Universally applicable filter housing for individual assembly with your own filter materials. Including hose connections. Technical data Length: 29 cm Diameter: 7 cm Capacity: 500 ml Connection: 1...
DUPLA - Cube Skimmer 120
DU-82500 Cube Skimmer 120, for saltwater aquariums - 120 l Always better with a skimmer! Protein skimmers are among the most important technical devices in a saltwater aquarium and have the important task of...
DUAL - Amino 24, 50 ml
DU-81332 Amino Acids Special blend of essential amino acids to promote coral growth and color. Supports symbiotic relationships between zooxanthellae and corals. Promotes the outg...
DUPLA - Premium Coral Salt AMINO ACTIVE 20 KG Refill bag for 600 l
DU-81438 Premium Coral Salt AMINO ACTIVE 20 KG Refill bag for 600 l Premium Coral Salt Amino Active contains a special concentration of amino acids that corresponds to the concentration in natural seawater. The Ami...
DUPLA - Silicate filter
DU-80512 Filter housing filled with 500 ml Duresin SI. To be installed downstream of an osmosis system. Including hose connections for osmosis systems. 500 ml filter volume binds up to 5.0...
DUPLA - Gel-o-Juice Artemia micro, 50 ml
DU-81750 Optimal nutrition for aquarium fish, invertebrates and corals is essential for their growth and health. A balanced diet is essential to provide the animals with all the necessary nutrients.
DUPLA - Gel-o-Juice Coral Food phyto, 50 ml
DU-81765 EN! Complementary food for corals & Co. Gel-O-Juice Coral Food phyto is a liquid micro floating food and plankton substitute for hard and soft corals, mussels, gorgonians, ricordea and other...
DUPLA - Ocean Refill 200 SE
DU-81568 The Ocean Refill 200 SE is a modern, sensor-controlled automatic refill system with electronic safety function for aquariums. Three optical sensors, including a safety sensor as overflow prevention, are...
DUPLA - Ocean Eco Pump OEP 1200
DU-82190 The Ocean Eco feeding pumps can be used in various ways in both saltwater and freshwater aquariums. The flow rate can be regulated manually and thus optimally adapted to the specific...
DUPLA - Hydrometer glass cylinder, 500 ml
DU-81613 Hydrometer glass cylinder, 500 ml, from the brand Dupla. Suitable for large Hydrometers....
DUPLA water care
DUPLA is a highly renowned brand when it comes to water care for both freshwater and saltwater aquariums. The brand is a jack of all trades, whether it concerns medication, additives, feed or substrate.
Measure & control
Something in the aquarium doesn't seem to be quite right. Algae, aquarium plants or corals die or aquarium fish die for no apparent reason. Recognizable? Then it's time to measure your water values. With an aquarium water test you can measure the most important water values in your aquarium and establish whether your aquarium is in good balance. This is important because the water values tell you whether and which actions you must perform to get a beautiful aquarium or to keep it.