Ballast block for air diffuser in 316 stailnless steel, the block forms a 90 degree bend for the air, with 1/2" female threaded connections.

The block is used when the diffusers are installed in tanks over 2metres in depth and when the diffusers are less than 2m apart. There is such extreme turbulence in the aeration tank when our diffusers are used that they sometimes need extra ballast to stop them from moving.
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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.


OEM and dealer enquires welcomed
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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

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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 8 mv to approx 1mg/l dissolved oxygen. Ideal probe for 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.

Please enquire about discounts for orders of 10 or more.
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Portable dissolved oxygen meter (Classic) with an optical oxygen probe fitted with 3m of cable. Water-proof to IP67 standard, data recording to 100,000 measurements, results displayed on a large 100mm display. Data can be downloaded to a PC, requires USB cable. Instrument is powered by AA batteries, or there is a rechargeable battery option.
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Fine bubble high performance air diffusers. Semi flexible diffuser construction 33cm long, 32mm diameter. Maximum recommended air flowrate is 1 cubic metre of air per hour. Materials of construction are plastic with 316 stainless steel end fittings. Diffuser contains its own internal fused silica bead ballast. End fittings are 3/8" 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.

OEM and dealer enquires welcomed
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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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