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Thanks for sharing this! Very helpful! I just dosed about 2 hours ago.My experience using fish bendazole to eliminate blue clove polyps (sympodium):
I visited this thread almost four years ago to help with a GSP takeover. Ultimately, I decided to take the safe route and remove the rock altogether. Now I'm back with a more full reef tank and the possibility of removing the rock from the tank just wasn't feasible. Only this time it was blue sympodium that snuck in undetected on a frag of zoas and quickly took over.
Before dosing the tank I removed my two starfish. I did not remove any other animal. I have a fairly diverse livestock of fish and inverts. No seriously fragile fish but as far as inverts go I have urchins, conchs, RBTAs, RFAs, a few crabs, and what remaining snails I have left that my wrasses haven't killed off. Fortunately, at least in the short term there was no deaths. I also have a diverse collection of coral. Many sps, lps, mushrooms, and zoas. However, no other softies that would be affected by the bendazole. I have not lost a single coral - at least not from the bendazole directly.
My tank is a Red Sea Reefer 525XL with a display volume of 108 gallons and a sump of 31 gallons. I've always estimated my total water volume to be around 100 - 110 gallons after displacement from rock and sand. With this in mind I used a whole 250mg package of fish bendazole each time I dosed. I purchased this a long time ago before I decided to go a different method. One thing to note is the medicine was expired but it didn't seem to affect it's potency.
This was the schedule:
Before treatment: Turn off skimmer, discontinue carbon reactor, turn off UV sterilizer. I kept GFO running.
1st treatment: The day of the first treatment I mixed a 250mg package of bendazole in RO water and dosed the full amount to the tank.
2nd treatment: One week later I performed a water change like normal and afterwards dosed another 250mg packet to the tank. I read another post where they waited two weeks before dosing again but I wanted to hit them again while they were weakened.
3rd treatment: Another week later I performed a large water change and afterwards dosed my final 250mg packet to the tank. Without my UV sterilizer and skimmer online my nutrients are starting to take off. I know growth is slowing because my ALK uptake has slowed. My alkalinity is measuring high as well as nitrates and phosphates. I also see what looks like cyano starting to take hold from my filtration being offline.
I'm going to let it run it's course until my next scheduled water change this weekend. After which I'll bring the skimmer, UV, and carbon back online. I would say it's been a great success. If the sympodium happens to come back I wouldn't hesitate to use this treatment again - if the medicine can be found again.
There's a few pictures that tell the story. The picture before the treatment shows how much the cloves take over and smother everything around them. It killed off a bunch of zoas and started to grow on parts of my acros. The after photos show them all gone. Now the process starts to get all my parameters back in order.