Seal foam?
I'm creating a false-bottom tank and need some advice. I used egg crate to elevate the soil substrate platform from the bottom. After that set, I blew foam from the top edge of the soil substrate area to the top of the enclosure. After a week passed I cut the landscape out of the foam. At this point, should I seal the foam with something non-porous to keep bacteria from growing? This is a narrow tank, with extended depth and stands about 3.5 feet high.
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