I picked up a 50 gallon res and two of those bubble curtain things. I like the amount of bubbles they produce compared to the stones. The stones seem to get clogged faster too. The only thing is keeping them suctioned to the bottom, but I am going to use glue to hold them down. So I will have a total of three bubble curtains in there because I have an extra one in my grow room after I switched back to the stone because it was too late to glue it down and the suctions didn't work. I'm just going to lay the two lids with my plants in them across the top of the 50 gallon bin for the next 4.5 weeks and cover the open area not covered by the lids with a trash bag and some mylar. Pretty ghetto, but hopefully it will do the trick. The fungus gnats are also back...