Scottishscales
Aquarium Advice Activist
I just noticed this today. This is the bottom of my tank under the sand. I just did a blackout and wondered why my tank was still green. My assumption now is that this is the culprit. Should i scrub it clean and blackout again or just blackout then stir up the sand?
"There's always a bigger fish." - Qui-Gon Jinn
"There's always a bigger fish." - Qui-Gon Jinn
