When You Decide To Buy Crabs / Crayfishes

[Sarcosuchus]

http://www.monsterfishkeepers.com/forums/showthread.php?p=726079#post726079

 

[philliptobin]

This is the filter I have used in the passed or you can get a small fountain pump and a 5 gallon bucket. With some creative cutting and drilling on the bucket the substrate in the tank can become your filter.

http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=3632&N=2004+113424

Good-Luck with the crabs next time.