I would leave the rock out. Just leave it bare boned. The rock will hold the meds forever especially a copper treatment and will also allow the parasites to continue to repopulate due to the rock being porous giving them a place to hang on to. Plus when you shut it down it will be a lot easier to sterilize with bleach.
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I believe Reefkeeping is not a hobby but a way of life It's unfortunate mine is at a stand still!
Building a 135 reef 9 years in the making(seem like I'll never get this 1 together! Too Busy with the Nano and Pico tanks
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