*BUMP*
I want to remove some GSP off of one rock, and wanted to know some options, without damaging my RBTA on same rock:
1. Put rock upside down, and bury the GSP in sand. Definitely doable, but how long would it take for them to die off? Days, weeks, months?
2. Does not look like a mat of GSP to peel off, but each one plugged into the rock pores. Use tweezers at the base to pluck them out. Not guaranteed to get all of it. Then do several rinses.
3. Muratic acid. I have this on hand to lower ALK of fresh salt water. Can apply with syringe outside of tank and do a long rinse on the area in the sink, then couple more tank water bucket rinses. Would the straight acid kill instantly, or let sit a few minutes?
4. Take out rock, and use blow torch. Never used it before, so don't know if it leaves any chemical residue. Does it take a long torch time to kill? Is simply a couple rinses in different tank water buckets enough to clean it off? I'll run a new batch of carbon of course.
5. High powered laser outside of tank. Dangerous to use and can cause blindness.
Rock in question: