Pimafix with melafix

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I've used it treating a tank with a pleco in it before , but not sure for the datnoid.
 
I am pretty sure they are both fine.
 
I dont know what my dat has on his fin.. could you guys look at the other thread for pic and advise?

Thanks
 
I've used both with all of my fish, including rays so it's pretty safe.
 
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