I was looking at those on eBay. Will they be heavy enough to stay at the bottom? I don't have a big pump like most of you prob have. Two of the ones from pet store with dual outlets I think they are rated at 80 gallons each. But I just don't want to have to tie them to the bottom if I'm spending $25 on an airstone.
P.S - my pump is a Sunleaves 950gph for 3 plants in a 6 gal tank...lol
I just bought 2 of these Avtive Aqua brand 8.5" x 1" as recommended @ $25 a pop. I wont use them this time as the roots are now big enough to hold down the stones.
I think these are real heavy and will diffuse the air, rather than just stir up the surface. That's okay until you get lots of roots, then
the surface doesnt move much and doesnt blow off carbon dioxide and absorb o2 like it did before. Then a difffuser like this really helps growth.