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Originally Posted by FISHPERSON
plants need a deep enough substrate for their roots to be buried. whats the minimum?? 1"?? More?? Less??
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Substrate should be 5-7 cm deep. Try to poke a stick to be able to reach the bottom and stir the sand. Wastes will show up mostly above the sand level so siphoning the wastes shouldn't be a hassle.
Cories will obviously uproot plants that haven't established their roots yet. Established plants are resistant to being uprooted.
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Originally Posted by fishperson
I know there are certain snails that dig through sand and mix it up but will they uproot and move around my plants??
Will the cories uproot my plants as they scour the sand for food??
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You may try the Malayan Trumpet Snails. As they dig on the substrate, they prevent anaerobic spots. That's how they got the name "aquatic earthworms".
Snails don't uproot the plants.
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Originally Posted by fishperson
can my cories, sand and plants ever live in harmony?
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Of course. As i had mentioned above, the plants will not be uprooted if established. Make sure the sand don't get compact otherwise it will kill the plants as compaction of the sand prevents the penetration of light and air.