I have an important question about your Alk
level. You said it was 5.5 and it was assumed you meant dKH
. However, And this is VERY important, is there a chance your readings are in meq/l. the exchange rate between the 2 is 2.8. So a reading of 5.5 meq/l is the same as 15.4 dKH
which is high. And based on the tank you have and your huge dosing regiment, I think is much more likely than a 5.5dKH. Especially with a calc reading of around 400ppm and mag at 1350ppm.
Another reason I suspect it is because my test kit that uses dKH
is scaled at 1 drop per dKH
. My other test IS in meq/l and is scaled at 0.5 meq/l per drop (amost the same once conversion is taken in).
So please check your scale and let us know. You may need to really cut back on the dosing.
On the plus side, if my suspicions are correct, there is little ill effect on corals due to a high alkalinity (as long as pH is still within range, which it should be), and the only adverse side effect is excessive scaling on equipment.