Calcium and Alkalinity

[kaOzGrUnT]

What can make both go up?
Ca: 520 (usually 460)
Alk: high
Ph: 8.4
NO2: 0
NO3: 0
NH3/4: 0
Phos: 1.0 (I've been messing around with new phos media, haven't gotten it correct) usually .5

The only change to the aquarium is the AI super blue LED lights, corals are happy and so are the fish...

The test kit is still good.

I have not dose in days so no I didn't add more than needed.

Thank you before hand for taking the time to help.

 

[DJYoshi]

are you dosing & what kind of salt mix are you using?

 

[kaOzGrUnT]

Instant Ocean, I buy the 200 gallon box, only corals in it is about 5 heads of frog spawn, large green carpet anemone, green tip anemone, a purple tip anemone, and recently a ricordea, I was dosing calcium from bottle about 5ml every week and it was always 460, I haven't added calcium for about two weeks and tested water today to see how much it dropped.... Instead it had gone up.
I just got the BRS two par dose stuff, but won't be adding anything until levels go down

 

[Josh]

What do you mean alk is "high"?

Do you test for magnesium?

 

[gatojebv]

I do no think you should be adding calcium at all. You do not have enough demand for those and water changes should be more than enough. You dosing is the reason is going that high.

Do some water changes and wait for those levels to come down on their own.

 

[DJYoshi]

I'd test for magnesium. Your demand for ca isn't that great..but MG is the catalyst when it comes to using up calcium... so check the MG levels & if you're under 1300, then it's time to start dosing MG... but I agree with the water change... try a 10% change and then wait 24 hours and test again... but def test the MG I think it's 1250 - 1350 is the range you want to stay in