Hi, I am a fairly new reefer using Aquaforest Component 1+2+3+ and Aquaforest reef salt. My tank is now 8 months old and currently has 8 fish, 5 snails, 1 coral banded shrimp and 5 corals, mainly leathers and Zooanthids. Tank is 244L total including sump. My dosing demands are currently quite low and from month 2 I stabilised dosing all components at 8 ml/day. That kept Alk around 10 dKh, Ca around 450 and Mg around 1450 ppm.
In the last 3 months I stocked up the fish (prior to that just 3). This with some overfeeding led to some GHA, and Phosphates rising to 0.24 ppm. They are now back to 0.04 ppm and I am targeting 0.02 ppm. GHA is receding.
My question is the dosing. In the last month Mg rose to 1600 and Ca to 500 ppm. Alk however dropped to 7 dKh. In response I have dropped my component 1+ and 3+ to 6 ml, and increased my 2+ to 10 ml 2 weeks ago. That has dropped Mg to 1440 and Ca to 460 ppm as tested last week. Alk stayed 7 so I increased that to 12 ml last week. I will test again this weekend.
I am hoping the low Alk is due to the water quality issues, and with time and regular WCs will stabilise. I aiming for a target of around 8-9 at this time but will of course monitor the tank and that may change. My Ca target is ~420 and Mg ~1400.
Aquaforest recommend dosing all components the same, which I obviously have not done, so I would like to hear anyone's thoughts on this.