actually not to step on any toes in DWC the you dont want water to hit 80 or above and prime temp for putting oxygen into water is 68. Best form of DWC is single buckets, that way if any problems arise and need to remove a plant you dont have to fight with tangled roots. Bucket ($2), airstone ($2), airpump ($10), netpot ($3), medium (your choice) and light (again your choice) thats it. Algae does not grow if your temp hits 80, Root rot will start to happen instead. Only way you will get algae is if there is a light source getting into where it is not suppose to be, Res!!
Have a nice day