How long does it take to replace all the water in your fish tank? You may be surprised to find out that doing two, 50% water changes does not replace 100% of the water.
I found a great online calculator that helps illustrate this point:
Here's a screen shot:
If you work with substrate-spawning cichlids, one thing you'll immediately notice is that fry can be extremely small. It's all too easy to siphon them out accidentally when doing a water change.
I keep newly free-swimming fry from egg layers in tiny 2-gallon Rubbermaid restaurant containers and I use a mini-siphon I made myself to carefully clean the bottom of excess food and debris. Here's how to make one yourself.
Here's what to do . . .
The Greater Chicago Cichlid Association — GCCA — is a not-for-profit, educational organization, chartered in the state of Illinois, dedicated to the advancement and dissemination of information relating to the biology of the fishes in the family Cichlidae, with particular emphasis on maintenance and breeding in captivity. We are simply cichlid hobbyists who love cichlids.