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  1. Hey everyone, So I didnt want to hijack other peoples threads just to ask, and although I felt like I could infer the answer from other's posts, I didn't want to jump the gun yet. Essentially I used to use the API GH liquid test to test for my alk, but I have recently got a Hanna dkh checker to start more accurate testing, and watched the videos I could on proper testing and what not. I had decided to start recording my Alk to see my trend in it. I noticed it drops .2-.4 dkh every 24 hours and wondered if its the corals or could something else be the issue? and if that drop merits a need to start dosing yet. I have been doing water changes about every 3 days since I started recording, to bring the Alk back up. the trend looks like this; 25g AIO 7.6 dkh 5/17 3pm 7.4 dkh 5/18 3pm 7.0 dkh 5/19 3pm 7.7 dkh post WC that night at 10pm 7.4 dkh 5/20 6pm (was unavailable to do test until later) 7.2 dkh 5/21 3pm I started testing my salt mix after mixing and I noticed my reef crystals was 9.9 dkh 5/19 for reference and i do 3 gallon changes. so another of my questions is if 8 dkh is a good number to shoot for? I noticed alot more coral growth now I am changing the water in response to dkh at or below 7. the thing that worries me is going much higher because I have a biopellet reactor and do not want to accidentally alk burn my corals, when I can get the biopellet reactor pushing my tank towards very low nitrates. my testing from before water change on 19th was 520 ppm Ca (API Calcium liquid test) 7.0 dkh alk (Hanna ALK checker) 1.0255 s.g. (refractometer I calibrate with fluid before all testing) 0-0.03 ppm PO4 (Salifert Phosphate test) 15 ppm nitrate (API liquid test) are these okay parameters to have? I use chaeto in a chamber, starting up biopellets, a protein skimmer, and water changes for nutrient export. my corals dont seem unhealthy, and I think since being more frequent with the water changes its helped alot with growth in my pocillopora and branching montipora. anyways, thanks to everyone who responds,
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