Carissa;25436 said:Same tank and reflectors - different bulb types? Maybe that would be difficult without removing the fixture though....but you could do T8s and T12s on the same fixture if you had two bulbs of the same size.
The only two fixtures I have are the two I tested. If I had saved the ballast and end caps from the little 10 gallon fixture I could hook it back up and see what a 15 watt linear tube does, but I didn't have the foresight to save the parts. I usually save everything, but this time I decided to not be a pack rat.
Today I'm going to try something else to see why I have such weak light from that 10 gallon fixture: The original Perfecto hood has a glass installed under the light fixture, which means a lip in the plastic to hold the glass. I removed the glass, but left the lip. That may be acting as an aperture to reduce the light getting through the opening. I can check that pretty easily.
That 10 gallon tank is now showing me what green water looks like.