Hairy Cyano like algae toxic?

[paddyob]

Here is a question....

What if I slowly clean a couple rocks OUTSIDE the tank first. Say 2-3 pieces a day. Scrub clean in salt water bucket. Or fresh? Then replace. Maybe to reduce the dinos?


Would that be safe or would the toxins still somehow release in the tank when placed back?

Just exploring some options while I get prepared. Might set up a quick tank I have empty. 38g. Use some water from my clow tanks and top up with new salt mix. Transfer fish (if possible) over. I have lots of rocks. Would be difficult at the least to get the fish without removal. Which could pose a new issue on top of the Dino's.

Input please.