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Hi; :fish:

1. Just wanted to know can feldspar be used in the canister and sump filitration for koiponds and large cichlid tanks setup

2. If can be used how will the bacteria get colonised in the feldspar which converts ammonia into nitrate and nitrite
3.If cannot be used what is the side effect in my tank

4.pls see this link for the feldspar pics

http://www.saibabamineral.com/feldspar-mineral.html
 

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Feldspar is porous, and bacteria can live in it. But the bacteria combined with the flow of water result in accelerated chemical weathering. This weathering releases potassium, sodium and alumina ions (and any other trace elements found in the mineral) into the water, and reduces the feldspar to clay. If your ph drops below 7 (acidic), the process speeds up a lot, and metal levels will quickly become toxic. The resulting hydrous clay media can also wreak havoc on your pump impeller.

It's best for alkaline ponds where acidity is nonexistent and completelty clear water is not required. It should be in gravel form, uniform in size, anywhere from 1/4" to 1"... bigger sizes will last longer but filter less. Similar to other bio-media, the best way to start is by soaking it in aquarium water taken from a water change.

You're probably better off with ceramic rings or bio stars, which will not release toxic elements. They may not last as long as feldspar but I would rather be replacing dead rings instead of dead fish.

:cool:
 
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