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One of the tanks I maintain..39 gal. Had a bad outbreak of what I thought was green and slime algae 6 months ago. I approached the problem from the point of view of limiting phosphates and nitrates. None of the typical methods worked.
Even though I have never had diatoms in any of the tanks I maintain over the last 10 years I decided to address the problem from the possibility I did.
I attached a uv sterilizer .. Way over what was necessary for this volume( I took it off my 250 gal system)
I hooked up a Rena canister filter.. Again good for a 200 gal system
I continued to run a HOT Magnum canister wit a 10 micron polishing filter
I also contined to run the hob protein skimmer
No water changes for 3 weeks
Diatom algae is completely gone now leaving the green algae on the rock which can easily be harvested by hand
The delima now is what filtration system to use so the problem doesn't reacur
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I prefer my substrates stirred but not shaken
Current Tank Info: 150gal long mixed reef, 90gal sump, 60 gal refugium with 200 lbs live rock
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