| I upgraded my shrimps from a 5 gal to a 10 gal fishtank and they love it, you can use that 20 watt bulb and it would give you 2 watts per gallon, & the plants grow great!
I actually set 2- 10 gallons side by side, and have a 4 ft. long flourescent bulb over the top of them both. The 4 ft floro is a 40 watt bulb, but only half of it is over the top of the tank, so the 20wpg is a good estimate. I'm happy with the way the plants grow cuz you can even grow medium-light plants in a 2wpg tank, and with the tank bein so small its easy to give it that much cheap lighting! |