I have a 36 gallon bow front freshwater aquarium. I have a 17 watt t8 full spectrum light, aqua tech power filter, and i keep the temp. about 72 degrees. Also i have a air pump with two airstones on each side of the tank. I have it stocked with 3 glowlight tetras to get ammonia in the water. It has been reading .25 ppm in ammonia for the past two months. So i started feeding them a little more. The ammonia is now at .50 ppm but still no traces of nitrite or nitrates. Also there is some but very little algae growth.