i tried the fan thing. ill say yes it did bring the temps down by a few degrees but it also killed my roots because they dried out due to the air movement in the res. i didnt expect it to work but though id still try while waiting for my delivery for h2o2 to arrive.
due to my roots drying out i had to cut them back to the rockwool block. now im facing a new problem. the rockwool blocks are packed with roots but now has none going in to the water and my air stones are flicking water up and making the rockwool blocks very wet. should i turn my air pump off and go back to top feeding until new roots grow down to the water. or just lever it alone till they grow and let watcher flick up in to the rockwool