| | All in One DIY Filtration, Nutrient Dosing and CO2
Why not use a timer and relay to control a valve and use a venturi principle. Would the fert fall out of solution if mixed with a volume of distilled water? I was thinking of the following setup:
1 " stainless intake line from tank, 2 gallon stainless canister layered with filter media of choice and inlet/outlet fittings for water and CO2, 1 " stainless outlet from filter canister (horizontal) fitted with 5 1/2" stainless drop tubes, each drop tube having a valve. Drop tubes connect to 1 gallon cylinders with flow control valve on top uptake tube to bottom. 1" Stainless tube connects to inline pump at 600 gph. 1" stainless tube discharges whole system back to tank. Put in a "T" fitting with a manual ball valves afer the pump and you can pump water via hose to the drainby simply closing the valve to the tank. Open it back up, close the valve on the pump side and hook the hose to your utility sink and fill the tank.
All in one, you have 4 macro solutions and one micro solution delivering adjustable volumes of nutrient, a filter that accepts CO2 and 1 pump driving it all that allows you to empty and fill your tank with minimal effort.
You set the frequency and duration of dosage with the timer and make adjustments to volume for each solution with the flow control knob as dictated by water testing.