Is that bad?
If I take one out on my finger, it is almost like a little piece of salt or sugar....and will break or crumble easily.
Maybe it doesnt matter at all, just havent seen it on anyone else's tank.
Thanks!
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor.
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