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m4x
on Aug 6, 2019
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A Quarter of Humanity Faces Looming Water Crises
This link suggests you "just" need to make sure all openings in the tank are sealed and the inlet is protected with a fine mesh grille:
https://www1.health.gov.au/internet/publications/publishing....
carapace
on Aug 6, 2019
[–]
Or toss a few guppies or goldfish in there.
prawn
on Aug 7, 2019
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That'd work in the tank (besides the fish excretions) but in a wet system, you have standing water in downpipes the diameter of a tennis ball that might get a little restrictive for fish.
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