Our cure — don’t worry about it.
Don’t treat it or dose it with chemicals.
In our KIS system, we only dose fresh water to replace (top-off) what is lost through evaporation.
Ok, ok, I’ve checked the nitrates and phosphates! In our KIS system, nitrates and phosphates are undetectable, but we still get plenty of algae on the glass of both the display tank and external refugium. Both tanks in our system do get a fair amount of natural sunlight. We run the lights about 5 hours per day.
Use RO/DI water. We do of course.
Algae eating clean-up crew? Good luck with that.
Who cleans up after the clean-up crew?
How many snails, crabs, and algae fish would you need to make a dent and keep algae under control? A dozen? A hundred? Will some of the snails crawl back in the rock work and die from time-to-time? How do you control for that?
The ReefKeeper is the clean-up crew. Scrape the algae off glass. Brush or blast it off the rocks and other surfaces so it gets caught by a filter sock and then clean out the sock. Or, siphon it out.
Think about this algae as somewhat of a natural filtration system fixing phosphates and nitrates however they happen to be getting into the system.
Don’t let the green algae build-up to the point that it is decaying and releasing problems back into the water.
A good basic test is to look at some water in a glass container against a pure white background. Is the water crystal clear, or yellowish, or grayish?
Smell the water. Does it smell clean and fresh, or a little “mucky”?