I'll get some. Wouldn't hurt to measure tank parameters with no refugium for a few weeks. Then if i added it back, i could see if it really impacts nitrates/phosphates.A normal dose took three weeks and there was no adverse effects to any of my corals, only the algae. So you could just choose to run a normal dose per the instructions and keep the Chaeto elsewhere for the duration, or you could just bomb that particular chamber in the sump with a massive dose and then drain it all out after an hour or so. I don’t know if that would work but I don’t see a downside of trying as long as it can be contained to that one chamber and be completely removed/cleaned. It’s reef safe at the normal dose though, just takes a while.
It may be that with the 50 gallon, that i go macro refugium-less.