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Bio-balls,bio-media, and practicality
I am cheap, and I like to think of myself as a pragmatist. And that
is why I would suggest using well rinsed red lava rock as your bio-media,
it is the best for your buck. Just go down to Home Depot / Lowe's and get
the smallest size, rinse well, and add to your canister filter or wet / dry
You want real surface area so you can really starve your plants for
nutrients, and you have the money, then by a fluidized bed filter, and I
don't mean a "sandman" filter. I used to use an FB600 by Lifegard. I used
it on a 135 gallon aquarium with large, rift lake cichlids in it. It gave
me zeros across the board on polutants. A fluidized bed has enormous
surface area. Whatever you do don't let it sit too long. Once I turned off
the pump that drove it so I could do a water change, and then left it off.
Well let's just say it went anerobic, turned black, and smelled aweful.
That's my 2 cents worth.