Originally Posted by ellisz
Anyway, I tested my CA
last night. CA
should be 390 or so. (Test kit is Seachem and volume left in the dropper was .22). ALK
is 2.5 meg/L. This seems to be in line. CA
is higher than I expected since I use IO and I have heard IO is low on CA
If your basing the balance off the alk
then yes the Ca
is a tad low but nothing I'd go nuts about. Just eek the Ca
up a bit each time you make additions or correct the saltmix first. It's really not that off though.
I assume with SPS's, the CA/Alk will get used up but with just a couple frags, will my levels be ok with just water changes or should I try and get the CA up above 400?
It really depends on the growth rate and amount of corals. Sometimes water changes will keep up but as you add more corals and the ones you keep get larger, the demand will definately grow as well. In the beginning at least the water changes should help but I would definately look into a 2 part liq additive or kalkwasser to keep up with higher daily demands. Doing water changes more than weekly can be a rather large pain in the .....
As you add scleractinian corals, keep a written log and test every few days for the alk
. This will give you an idea of the rate of depletion and help you decide what would be easiest to maintain them.