algae problem


Active Member
have you ever changed the cartridges on your RO unit? Perhaps you are nearing the end of their useful life and just need to replace them!


Active Member
I run a 75 gallon tank too, and I think you need more water circulation. The tankwater looks stagnent to me.
A Mag7 in the sump, and (3) Rio600's may not be giving you enough water circulation - especially down deeper in the tank.
Here's what I would do ....
1) I'd stop feeding the clean up crew. They'll get lazy - keep them hungry.
2) Run activated carbon for several days - change it - run some more.
3) After I clean it - I would run that skimmer full tilt 24/7
4) I would test for phosphate for sure.
5) Make sure your alk and pH are up where they should be.
Low pH encourages nuisance algae growth.
6) Move the water more - get it moving from bottom of tank to top.