Suggestions on my 65g w/ 20G sump

[The_Chad]

Ca - 460
Ph - 8.1
DKh - 18
Ammonia - .25
Nitrites - 0
Nitrates - 0
Temp - 79 degrees

2 x 250W Mh pendants running Pheonix 14Ks - 12 hr schedule
Reef Octopus 4 skimmer
3300 gph of flow
floss filter element and carbon filter element in sump
basketball sized chaeto in sump as well

5 green chromises
1 arrow crab about 8 inches in diameter when in normal stance
2 emerald crabs
12-18 red and blue legged hermits
12 margarita snails
3 dove snails

in a 65g / corner overflow into a 20g sump (actual fluid volume) been cycled for 25 days now.


Any reason why I should not be able to grow SPS? Or are there any flaws in my setup??

 

[JAustin]

Ammonia must be 0 IMO. Dkh is also too high, way too high. Natural sea water is 7-8, most run 8-10, fewer run 10-12.

 

[The_Chad]

OK newbie question, how do I get my DKh down??

 

[JAustin]

You can let it come down on its own or you can do water changes.

 

[The_Chad]

See I just did a water change and prior to water change it was 10, now it is 18. Not sure what is up with it, also the Ammonia is actually 0. I was under different lighting and my test looked slightly green

 

[Nanook]

Test kit user error perhaps? What happens to your acros?

I would get some decent test kits if you don't have them already. Check the chemistry forum for reliable test kits savvy reefers use these days