I use 3-150 watt MH across a 24" deep 96" long tank and coverage is fine and tank is bright on the substrate even though the tank is covered with scratched up acrylic and a layer of window screen. You probably would be fine with a 70 watt fixture.
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.