water additives

[calvindo]

hi folks,
my tank is now 4 months old. have not added any additives since starting it. all my corals looks great, except for one. i've done a 20% water change, weekly. besides that, nothing but food goes into the tank. the one coral i have that doesnt seem to bloom, like how it use too, is a hammer coral. below is todays water results
amm - 0
nitrite - 0
nitrate - 0
phosphate - .25
ph - 8.2
sal - 1.023
cal - 360
alk - ??? need a test kit
thanks in advance....:help:

 

[cjb82]

Not an expert but your Cal. appears to be low. I think your Cal. should be atleast 400.

 

[bang guy]

You really need to test your ALK if you have corals. It's the most important thing they need to grow.

 

[nicky1.8t]

i would raise your calcium o at least 400 i try to keep mine any where between 400-440
:joy: :yes: :joy: :yes: :joy:

 

[calvindo]

thanks... i got some calcium supplements today. before adding it into my tank. it tested at 340

when should i test the water again? in a day? a week?
one more question... i purchase a alkalinity salifert test kit today, but confuse on how to read it. it took 53 drops into the vial, before it change to orange. if you use the same kit, please help...
thank you

 

[calvindo]

anyone?

 

[blk822]

I have been told that your Iodine level also affects your corals opening....Reseach that also ...