On my first tank I added a DSB (after removing the CC substrate). Thought gave a really good rinse, added using a 2" pipe, but everything still went milky. After about 12 hours could only see about 3" in and started getting really worried but after 24hrs had cleared right up.
I ran the filters and skimmer, though the skimmer was probably a waste (would keep filling cup). Wasn't until things cleared up that could I dial the skimmer back in.
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