Purple and red cap dying

Hello i bought two frag of monticap just to see if i can maintaing sps and as you look in the picture they r no doing pretty well any advice how to save those caps ?? All parameter are 0 except phosphate 0.1 and 15 to 20 nitrates i dnt dose anything and i do 10 gal weekly my tank is 65 gal... Salinity always on 1.025 n

 

what is your alk?

 

I would say the Nitrates are probably the problem but please answer Mel's question first as well as your Magnesium and Calcium level.Flow????

 

Good question i barely do this test :S last time i tested ( 23/11 ) was 10 but give me a couple of hr and i do the test again

 

i dnt have cal test kit :S

 

You will need to test alk.,mag., and calcium to have any chance at keeping sps.

 

Other caps look good. definitely need to start testing those params but check for tiny nudibranchs as well.

 

The alk read 7.3 , 7.7 two diferrent test same test kit ph 7.8