I don't have any check valves so I will have to run out and find some. Not sure if we are going away this weekend now, looks like all campsites are full already...
Prior to setting up this tank, my alk has always been at 6 in my small tank, it caused issues with SPS but nothing else, figured if everything was ok, don't mess with it. Had great growth from everything
I understand the relationship between calcium and alkalinity, so last nights results were not surprising there. I don't have a lot of corals in this tank as stated ive lost a lot, for lps I have a wall frogspawn, bubble coral (has grown significantly in the last few weeks) fox coral, brain, duncans - have 2 heads out of 11 left, some zoas, mushrooms (blue rics just split) gsp, and green polyps. My pectina and goniopora are almost dead. I did move my button coral to the other tank, only because i had a fish flipping it. I haven't moved the frogspawn, am moving it to a different location to see if it's flow. Most of these were transferred to this tank in March this year.
I'm diligent when testing and have double tested to make sure results are accurate. My elos test kit (mag) is about a year old, API is about 8 months.
I dosed mag and all last night, I expect they should be at 1350 mag and 8 alk, haven't tested yet tonight but will to confirm.