Great idea! Luckily I don't have any issues on my rocks, but will try this if I ever do.... please no.....
Even if it is not evident I would blow off the rocks and siphon anyway. It will only help. I don't remember which of the moderators of that thread tried but hey was putting chaeto balls directly on the sand where the Dino's were and I think he had some success but that could have been a shadowing effect as opposed to directly inhibiting. Good luck your tank is worth the effort and you should be proud of how beautiful it has become. If you need any sanity checks feel free to reach out. Hopefully this goes away quickly
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