Kynar ozone injectors for the diffusion of ozone into water
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Fine bubble high performance air diffusers. Semi flexible diffuser construction 300cm long 32mm diameter. Maximum recommended air flowrate is 10 cubic metres of air per hour. Materials of construction are plastic with 316 stainless steel end fittings, aslo fitted with non return valve in diffuser. Diffuser contains its own internal fused silica bead ballast. End fittings are 1/2" acetyl plastic as standard.

The Dryden Air diffuser is the leading air diffuser used in UK aquaculture, treatment of leachate water on landfill sites, sewerage treatment and numerous other applications.
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AFM (Advanced Filtration Media) grade 1 is the standard sized AFM media equivalent to 16 x 30 grade sand. M

Supplied in 25kg sacks, grade 1 particle size 0.5mm to 1.10mm. Media should be used on top of a layer of grade 2 AFM.

Price is per 25kg sack
(For bulk quantities and dealer prices please contact us directly at aqua@drydenaqua.com )
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High performance, very robust galvanic oxygen probe for the measurment of dissolved oxygen in water, waste water and air. Completely sealed internals, so there is no risk of insulation failure, heavy duty Sub Sea cable, high mv out-put 6.5 mv to approx 1mg/l dissolved oxygen. Ideal probe for the Dryden Aqua, AquaTraul system or your own oxygen monitors such as multichannel or stand-alone PLC based systems.

The probe is supplied with 5 meters of cable (alternative lengths available), pack of 5 membranes and 50ml of electrolyte.
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This is a standard general purpose low cost float switch. The cable is PVC. A pivot point weight can be added to the cable if required.

The float switch is rated for 240v ac 10 amp inductive load,

The float switch can switch small pumps on and off directly, however it possible it is always best to use a low control voltage which is used to activate a remote relay. The remote relay can then switch heavy loads such as pumps on or off.
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Eco Treat is a natural supplement that will restore the biological harmony to your pond and actively improves the environment for your fish, plants and wildlife. The product will reduce blanket weed and algal blooms by reducing the organics, nitrogen and phosphorous levels in your pond, lake or fish farm. The net result is a cleaner healthier pond.

Ecotreat is an inoculation of beneficial bacteria, the quantity to add to the water depends on the size of the pond/lake. To calculate the amount, determine the volume of the pond in cubic metres and divide the result by 1.6. If the lake is deeper than 2m use 2m as the average water depth. The result is called the dose factor D. The initial dose to be added is 2 x D in grammes. Two weeks later add 1 x D, then 0.5 x D every month thereafter.

Excess weed and debris should be removed from the lake if possible, also you need to increase the circulation and oxygen levels for best results, an aeration system will perform this task. A packaged system is included in the shopping cart.

Pack size is 1kg.
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Our reverse osmosis unit is fitted with 5 stage filtration system in which one of the stages is the reverse osmosis unit. The other four stages included a sediment filter and three carbon filters. The filters (excluding the reverse osmosis) should all be changed at the same time from 6 months to 12 months. If your water is hard and contains a high chlorine concentration, then it is recommended that it is changed every 6 months. The price of the product in this section, includes stage 1, 2, 3 & 5 elements. Stage 4 is the reverse osmosis membrane.
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Tear drop water level float switch, the float switch measures approximately 125mm in diameter. , total weight including cable 1.8kg
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Weight for the standard float switch 10.1.37
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Clock work belt feeders designed for feeding fish, but can be used for a variety of powder and pellet dosing applications. Four models are avaulable, 3 kg unit and 5 kg unit with either a 12 hour or 24 hour clockwork mechanism. The weight factor relates to the maximum weight that can be loaded on the belt.
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Artificial seawater salt mix comprises of a blend of the 5 main constituents of seawater. Simply add 1 x 15kg bag of the product to make 500 litres of artifical seawater at 30ppt. Suitable for use in depuration units and crustacean holding systems.

Supplied in 15 kg bags, sufficient to make 500 litres of artificial seawater
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