CE-27807 Solar Oxygenator Kit (fosterandsmith) Thanks for making me think more about this issue! I think my most populated tank (100g shubunkins) will be my trial tank and I'm gonna try one of these solar kits. It's basically just a solar powered airstone. Negative is that it appears to only work during the day. We'll see if it is tolerated by the waterlilies and provides the oxygenation when temperatures get too high. I don't think filtration is as important as water movement/oxygenation here. Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member