Felt like I should chime in since I am also doing an interceptor regime right now as I noticed a bug on a new acro I had bought. I had previously done interceptor a while back at >6x dosage (1 large dog pill for 60G) for 3 straight weeks with to treat white and red bugs with no side effects. They are so hard to spot!
I should have quarantined the new acros, but they were partially bleached from cooking them on the drive back. Regardless, I did perform a 10 min KCL dip at 2 TBSP/G to kill any flatworms (didn't see any) and rebased all frags. For me, passing the flatworm test is the most important. Seller admitted he does annual interceptor, so I thought it was safe, but here we are.
For this round, I used interceptor plus with prazi. I had removed most of my hermits and both of my shrimps before hand. I had to leave my 2 blue porcelain crabs in because they are hard to catch. Skimmer was on for oxygen, but I removed cup plug so water would return. I turned off my reefmat and GFO reactor and did not run carbon.
Shortly after dosing, bristleworms were whipping around dead in the tank. Some acros were fine, some kind of closed up. LPS were kind of *****. Today, I would say most things look normal. I don't see any pods near the sand as they usually are. To my surprise, my porcelain crabs are still alive but looked drunk last night. Cocoworm, fanworm, and wrasses were unaffected by the prazi. I will also say that it's pretty cool to not see any spionids too.
Will try to keep ya'll updated, but 6x interceptor dose for 3 weeks in a row is totally doable. It definitely eradicated white and red bugs for me when I did it in the past. FWIW, two close local reefers have tried 10x-12x dosage with no issues.

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