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Bluish black gelatinous stuff, oh my!

Subject: Bluish black gelatinous stuff, oh my!
by Nunciata on 18/7/2020 19:58:20

Hello,

I’m 16 days into a fish-in, 1 make betta, cycle. I’ve been able to keep the ammonia down below .25 daily. I do 20% water changes every other day.

Today while doing the water change I noted this goo on one of the rocks and a plant. Pics submitted.

Any idea what it is? Should I be concerned? Also, I think I have a green algae problem as well.