Use Sump for Water Changes
Use Sump for Water Changes
I have a 75-gallon display tank with a 29-gallon sump refugium. The return compartment of the sump is 20-gallons with an external pump. I have a Kold Ster-il system which gives me filtered water on demand. I believe that filtration systems are less wasteful than RO systems and not as dangerous as DI systems.
If I want to perform a 20% water change, I simply turn off the pump, siphon the return compartment, mix salt in the return compartment, heat, and turn the pump back on.
To perform a 30% water change, I need to siphon the entire sump and the overflow:
1. Turn off external pump & skimmer
2. Remove skimmer & chaetomorpha
3. Siphon sump, remove standpipe, keep siphoning until empty
4. Mix water and salt in sump and heat
5. Replace skimmer, chaetomorpha and standpipe
6. Turn on external pump & skimmer
The 30% water change used to be easier when my sump had a hang-on skimmer and no macroalgae.