i find that even if i slowly pour the salt in, it will start collecting on the bottom instead of dissolving. i have a couple koralia 750s that i might try next time. i also stirred a couple times over the last day, so the only thing i could think of was that something (calcium?) became saturated.
this is also my first wc =S. so its not like its happened on a regular basis, and this didnt happen when i mixed the salt in the tank the first time.
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