Well I was and that got me to thinking and after looking at my indoor turtle pond made with a tote I realized my underwater filter not only filters the water but generates a circular current in the tote. What reasons would I not want to incorporate this into my grow? So far I can only think that it may heat the water somehow but I don't think it could too much because I had to add a water heater to keep up over 70. Anything else?
..... water water pumps create heat... this is why if you add a pump you need a res chiller water temp is suppose to be below 70... air temp about 75 if you added a heater to heat your water you might end up with a hermie, keep those temps below 70
I just use a bigger, more powerful air pump, to oxygenate the nutrient solution, and it keeps the nutrient solution all mixed up nicely.
if u keep the tote on the ground the cold cement should pull heat from it (but ur using a tent and that will insulate). the under current system uses a lot of air stons and a slow current... what sunn said... more bubbles! with higher dissolved O2 lvls u can higher ur ppm and force faster growth