you ask a hard question Bluboy!

its not like rating a filter on a 1-10

the hard part to keeping them is finding out acurate information ! there is a lot of trash writen about them !
finding out what to feed, how to medicate ,its easy to pannic and throw in medication after medication! When you would be better to just do a waterchange!what they do need is stable water conditons and larger waterchanges ! ( good water!)

I regard black mollies difficult to keep as I had no sucsess breeding them sucsessfuly!

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