The Planted Tank Forum - View Single Post - Why Pay for Nutrient Rich Substrate?
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post #6 of (permalink) Old 10-19-2015, 12:04 AM
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Anytime you top something with something else you will get a mess when you rearrange things. Get a fine gravel that has a grain size of 1-2mm dia. That will allow the amount of water circulation the roots need. If you plan to have bottom feeders it would be best if the grains were rounded rather than sharp.

Caribsea Peace River fits this criteria, but is expensive at over $1 per lb.
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