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Time for a little update. I think it's important to document the bad times and mistakes we can make to help other reefers out there. Since we have another little one on the way I figured I'd lower the alk in the tank a bit over the course of a couple weeks so I could change from coral pro salt to the regular blue bucket in hopes to cut a little cost. Big mistake. The tank has always thrived at an alk of 9.8-10.2 so slowly lowering it to 8dkh caused all my montis to perish. We started this tank with coral pro and it just works for us. I like to do 15 gallon water changes weekly and with that and dosing the alk stays right at 10dkh. The corals I didn't loose are recovering nicely and color has come back strong. So, if your tank is thriving and healthy, don't change anything Here's a few pics of the damage that was done to all the montis. I fragged the SPS colonies and they have recovered nicely.