I tried it in a 10 galon rezervoir.
it can take temp down in 4-8 dagrees f.
but if you don't isolate the rezervoir from outside air temperature it can't halp much.
what i did, was to cover the res sides with polystryene panels, and then duct tape on everything. once i did thet, i drop...
so i used the advices from here and added some epsom salt. foilar spray with it yesterday half an hour before lights on, and toped up the res with 3 liter of RO water with the left over epsom salt. 150 ppm epaom salt in the top up is about 15 of it to each liter in the res.
look like it halps -...
ohh thet sounds good, i was thinking it's a waste of nutes all those res change whan you throws them with the water.
so the manufector instruction has nothing to do with DWC. i followed the instruction and it took me to very high level of PPM. also the guys from the hydroshop couldn't help much...