- Joined
- Oct 2, 2017
- Messages
- 155
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- 122
How come I can grow all the coralline algae in the world on my glass and plastic pieces, but can't get it to grow on the rocks, where I want it, hardly at all.
I'm constantly scraping the glass, and anytime I put anything plastic/acrylic in there (a new pump, a frag rack, whatever) it is completely covered within a few weeks. The rocks though? Forget it. There are a few small purple spots here and there if you look really hard, but it simply doesn't grow on the rocks. This seems so odd to me. Any thoughts?
I'm constantly scraping the glass, and anytime I put anything plastic/acrylic in there (a new pump, a frag rack, whatever) it is completely covered within a few weeks. The rocks though? Forget it. There are a few small purple spots here and there if you look really hard, but it simply doesn't grow on the rocks. This seems so odd to me. Any thoughts?