I have a 5-gallon glass tank for my 2 hermit crabs. I feed them river shrimps twice a day, but they leave a lot of food untouched, which tends to settle on the bottom of the tank between and under the rocks. I have a shallow rock bed, but no soil or gravel. Is there an alternative to dumping the entire tank in order to flush out the leftovers from the bottom?

  • In general you should feed an amount the crabs eat in a short time. There should be nothing left over, because it has bad effects to the water's quality and then to the health of your crabs. Sep 26, 2021 at 10:17

1 Answer 1


I have a turtle, it produces a lot of poo, so I had this kind of tool:

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The water is pulled into the pipe and pushed out trough the net of fabric, so the dirt stays in this fabric bag.

Now I have some fish, who eat the poo. Less work for me :)

  • What fish eats poo? Pleco? Oct 17, 2023 at 10:26
  • @LocustHorde I have goldfish, they try to eat everything, floating/swimming in the water :) Oct 17, 2023 at 10:45

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