Quote Originally Posted by Racerx
they look like the water temp is too high. Can you get the temp cooler? Consider dropping ice bottles in the res, etc. Some H2O2 and cool water tempatures should help get rid of the algae.
my thoughts exactly esp when he said that he had a water heater involved...

dude you want you temps low.....i find 70* is perfect for my tomatoes:thumbsup: