if you are interested check out this effective little bio filter i put
together. it only took me one afternoon and saved a ton of money...
Let me know if you can think of any wats to improve it.
Plastic is better. Is the top open or closed. Mine is open, I grew
iris in there one time, cannas another time. BAD idea. They welded
the rock together. I have water hyacinths in mine now, they work well
except when they plug up the outlet.
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