Slopes never stay very long as things slide and level in a short time. Most all plants do fine with 2" of substrate. More and you'll end up looking at about an inch of it across the front glass.
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If at first you don't succeed,,, keep kicking it
RubberSideDownOnTheLanding,
2- 75g planted, 2-55g planted, 110g w/30g sump, 10g Refugium, doghouse/newbie
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