Question on ph & alk

[mdvm]

I just started getting into the world of corals(1 leather and some polyps). My tank has been running for 7 months with dsb and lr. Here are my most recent test results that concern me:
ph=8.6
alk=border line hi-test kit does not give actual reading.
ca=350
My question is what should I do if anything to get my ph down and what relationship does that have with alk and/or ca. All my other reading a normal.
Thanks in advance.

 

[broomer5]

In theory, the higher the pH, the harder it is to keep calcium in solution in the tankwater.
Having a calcium level of 350 is nothing to worry too much about, but I'm pretty sure you'd like to raise it a tad.
Without knowing the actual value of alkalinity in either dKH or meq/L, it's sort of hard to tell what's going on in there.
Borderline high is a relative term, and we don't know what the manufacturer of your kit considers high.
If your pH is indeed 8.6, then it would make sense that your alkalinity is up there as well.
What time of day did you measure your pH ?
You have a couple of options.
You can add calcium - like calcium chloride - and see if you can get the level to rise.
You can do a series of water changes to get things back into balance.
You can do nothing.
The pH typically will tend to drop over time if you don't do something to maintain the alkalinity. How long will depend on your own tank conditions, fish, freshwater source and other factors.
If it were me, I would first get a new alkalinity test kit that would give me a good reading in meq/L, such as Salifert test kit, and see what the level is really at.
Then, once that is known, I would choose a corrective course of action.

 

[mdvm]

Thanks for the reply, the test kit is made by SeaChem and it show a section for low-good-high on the chart and my sg is 1.24. As far as the ca I began dosing at the recommendation of the lfs when I added the corals but taking baby steps. Are any of these valves concerning?