I've dosed Interceptor( not th spectrum) a couple ofmonths ago for the first time with good effect on red bugsand no harm. Pods recovered qucikly.
I've dosed pazi pro for flukes but not to a reef tank. it works well for for flukes but not internal nematodes , ime. Treated a radiant wrass in quarantine with heavy doses and the worms didn't quit till it died over the course of 4 days. The manufacturer,Hikari, says it's safe for reefs except for worms that might be kept.
I have never tried the Interceptor Spectrum. I've read a bit on paziqauntel and prazi pro in an attempt to determine how much praziqauntel is in prazi pro so as to compare the usual dose with what would come in with (228 mg) with a large dog Intercetor Spectrum tablet.containing 23 mg of milbemycin.
The information on prazi pro contents is hard to find. I found one reference that lists the ingredients as: oxibisproparanol( as an inert solubilizing agent) and < % 5 praziquantel. The recommended dose per HIkari ,the manufacturer, is .25ml per gallon ,so if we assume,%5 is %4, that would be: .04x.25 =.01 mg per gallon as a "safe" dose.
The usual interceptor milibemycin oxime dose is 23 mg for up to 380 gallons or .06mg per gallon.
A 380 gallon tank would get 228mg of praziquantel with a large dog Spectrum tablet. The "safe" dose or prazi pro , the Hikari product, would be only .01 x380 or 3.8mg,60 times less. I don't know if the higher concentration of praziquantel would be harmful at the higher concentration or not but 60x the usual dose is a lot to worry about.
I'll be reading accounts by users closely before I think about using it even for dips.