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· Premium Member
1,412 Posts
I think that GDA/GDA is a necessary evil in our hobby.

We can limit it by what Zapins has mentioned, shorter photo period, light higher off the surface of the tank. Maybe the perfect balance of ferts but that remains to be seen.

I am content with cleaning the glass once a week with my water changes and have accepted this as a side effect of having a high tech high light tanki.
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