I had almost finished the installation of my aquaponic system in an elementary school and I see what looks like an infestation of small white flies? There are little tiny white thigs that look like very small grains of rice and also small white things ruling around. Is there any easy solution to this? I only have the next four weeks to do projects with the kids. Dismantling the whole system and starting from scratch is probably out of the question. Any ideas what I ca do?