D-D H2Ocean P4 Dosing Pump


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D-D H2Ocean P4 Dosing Pump
Available in selected stores only
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  • WiFi control of dosing pumps via App
  • Battery back-up, settings saved even in the event of power outtage
  • High quality PharMed tubing
  • Flow rate calibration
  • Fluid volume: 0.1ml to 9999ml
  • Program 1 to 24 doses per day
  • P1 and P4 Pro also available

As in every industry; complete automation is becoming more and more of a trend in the aquarium trade. Automation makes aquarium maintenance easier and less time consuming. Dosing pumps are one of the newer pieces of equipment on the market that aid in maintaining a consistent aquatic environment by adding precise amounts of additives to the aquarium water on a daily basis, or even multiple times per day. This is particularly useful in reef keeping due to all the differing elements required for healthy coral and reef tank growth. A steady supply of elements like calcium, magnesium and other essentials can be programmed to be added as necessary to stop croal growth slowing down to unnatural levels. You can even use dosing pumps to add freshwater back into the system to compensate for evaporation and prevent increase in salinity levels. 

Product Highlights

Medical Grade Reliability
The H2Ocean dosing pumps from D-D Aquatic Solutions are an innovative smart pump that has been developed along with Kamoer a company who specialsie in the manufacture of medical grade equipment and as such these pumps are extremely reliable.

Compact Design
The P4 pumps are compact with a small footprint of only 25x5cm meaning they will fit easily in almost any aquarium cabinet, without invading the sump space. An optional low profile mounting bracket is available separately.

H2Ocean Dosing App
The P4 pump provides simple, flexible and precise control of supplement additions through the easy to use D-D H2Ocean mobile app. The free to download app allows you complete control of each of the dosing heads to operate independently to each and have a unique flow calibration under different operational modes (manual, auto quick setting). The dosing amount, duration and frequency are all completely customisable.

    P1 P4 P4 Pro
    Dosing Heads 1 4 4
    Fluid Volume 0.1 to 6000 ml 0.1 to 9999 ml  0.1 to 9999 ml 
    Head Height 2m 2m 2m
    Accuracy <+/-2% <+/-2% <+/-2%
    Pump Life >2000 hours >2000 hours >2000 hours
    Dimensions 100 x 95 x 66 mm 250 x 50 x 87 mm 250 x 50 x 87 mm


    Delivery costs for your order will be calculated during the checkout process based on your delivery address and the contents of your basket. You will only pay one delivery charge for your order. Express delivery is FREE for online orders OVER £39 unless any of the points below become a factor.

    • Some large items like aquariums, ponds and pond liners will have an additional charge of £45.00 to help offset the cost of a pallet delivery.
    • Orders containing a physical gift card will have an additional charge of £2.45 to cover the cost of materials and delivery (digital gift cards are a free alternative).
    • Orders to highlands, islands and Northern Ireland may incur an additional delivery charge displayed at checkout this is based on the postal code provided. DPD provides a list of postal codes which have additional surcharges. Some of these post codes may also take 2 working days to arrive, even on express. Pallet deliveries cannot be sent to these post codes.

    We only ship to the UK and cannot ship internationally.

    We aim to dispatch items that are currently in stock on the same working day if they are ordered before 2.45 pm (excluding Bank Holidays). Orders after 3pm will be dispatched the following working day, unless it fits any of the below criteria:

    • Orders containing live plants will take up to 2 weeks to arrive. We take a week's worth of customer orders and then inform the plant farms of the specific quantities we need to fulfil that week's order to avoid wastage.
    • Pallet orders containing large items like big aquariums will take additional time to arrive as they are sent by a third party. These orders will NOT be dispatched until we have been in touch to arrange a delivery date, this is to ensure someone is available at your address to sign for the delivery. Deliveries will generally be delivered ‘curb side’ within the terms of the agreement we have with our couriers so you will need to make arrangements to transfer larger items into your home yourself. Unfortunately, our drivers are not insured to transfer the aquarium into your home.
    • Physical gift cards and items from the gift shop (such as clothes, towels etc) are sent with 1st Class Royal Mail. Delivery usually takes 1-2 working days, though in rare cases and orders placed closer to public holidays (Christmas, Father’s day, Mother’s day etc.) may be longer.


    If you are not 100% satisfied with your purchase online from our website, you can return the product and get a full refund or exchange the product for another one, for up to 21 days from the date you purchased it.

    We strongly suggest signing up for an account with fishkeeper.co.uk as this will allow for some additional returns options like return to your local store.

    If you checkout as a guest you will need to return the product to Maidenhead Aquatics, PO Box 619, Egham, Surrey, TW20 2BS, please package the order (along with a packing slip or a note including your name, address and order number).

    Large pallet items like aquariums are deemed delivered successfully with no damage once the the driver has left the property. If a report of damage is submitted after the driver has left we may be unable to assist with replacements. We recommend refusing a damaged delivery, this is the fastest resolution.

    Our full terms and conditions can be found here. When you place an order with us online you are agreeing to these terms and conditions.

    For delivery before Christmas, orders must be placed on or before 3pm on Wednesday 20th December. We cannot guarantee delivery of these orders pre-Christmas as we are reliant on our couriers, but will use our best endeavours to get orders placed on this date out to you before Christmas. For full details of our festive delivery and opening times click here

    Please note: online orders placed after 3pm on Friday 22nd December will not be dispatched until the New Year. For full details of our festive delivery and opening times click here