Re: Aquatic Plants Digest V1 #381

>> I was thinking about UGF and came up with the following: What about
>> putting a spaced coil of hard PVC tubing(say 1/8 inch diam) under
>> the substrate and pumping warm( or hot) water through it in a closed
>> loop system? Any thoughts on this??
 Check out the July, 1995 Aquarium Fish Magazine. It has a complete
description of how to build an Undergravel filter using PVC, a heater and a
small water tank. I built one from the plans in the magazine and eventually
turned it and the yeast-based CO2 off because I got tired of trimming the