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Geo tank - no need to gravel clean?


glo
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Hi,

I have 2 geo tanks that sit on the top row of a rack where the sump is at the bottom. Each tank has a thin layer of sand. I very rarely siphon from these top tanks - usually do my water changes out of the 2 bottom layers and I don't seem to find I have a problem with the build up of fish poo in the geo tanks.

Just wondering what sort of experiences other geo owners have had.

Thanks

Glo

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Pretty much the same situation here but with 2-3mm gravel.... I used to try and vacuum it every time but now only every now and then because its always so clean.

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Same here. The 2-3mm gravel in one tank is always clean and the sand in the other is. On the other hand the filter wool gets very black very quickly.

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