how much sand do I need?!?
I have a 100L/26g tank, dimensions: 66cmX39cmX48cm/26inX16inX19in (LXWXH).
How much sand do i need to adequately cover the tank bottom??
That depends on your objectives - if to just cover the bottom, very little, maybe an inch at most. For plants, at least two inches and somewhat deeper in the back to give a slope effect; and to create a bio-processing very low oxygen nitrate absorber, three to four inches deep. These values all assume sand; gravel would be at least 50% greater for each case.
If you just mean bag weight to achieve some arbritary but useful depth, well, for a 26 gal tank, I'd guess between sixteen to twenty-five pounds.
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A 75 gal with eight Discus, fake plants, and a lot of wood also with sand substrate. Clean up crew is fifteen Sterba's Corys. Filters: canister w/UV, in-tank algae scrubber that removes phosphates and nitrates! Also, a highly dangerous commercial nitrate removal unit from hell
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+1 to the above
I have about 1.5 inches in my tank with a moderate amount of plants which seam to work very well. If you don't want/plan on any plants, then I would suggest 3/4 to 1 inch to make routine maintenance a little easier
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Try this calculator
I agree with the others, you don't want the sand bed to be too thick.