Been back out in the carport 'fettling' again...
Re-fitted the HF5-4040 membrane, pre filters, 2x tds meters...also fitted the 1000 watt koi tank heater and digi-stat...
The section in the photo will also have one of those 12v boat tube heaters with a thermostat as a backup to protect the membrane.
I am also working on the fact that the 1000watt heater in the center of the water tank will heat the tank and that heat will radiate through the tank walls...I have left a space around the tank so that this warm radiated heat can flow around...the temp probe is attached to the pump in the tank which is at the base and at the membrane end and the heater is about 3 inches off the bottom/center of the tank.
The idea is too fill the 2000litre tank once a week and once filled the heater will be turned on and the once the water is upto the set-point (around 5 deg) it should'nt take much to keep it at that temp as 2000 litres is enough water for me most weeks.
Cheers
Dave.