diablo30xp

I just recieved my hanna phosphate checker (HI713). Tested my water the way the instructions said. Is it possible to have a bad reading after 3 tries? I have green hair algae growing and algae on my sand bed growing for about a month or two. Will it show any readings to measure? i want to make sure im doing something right or not. Ialso bought some phosphate rx should i still dose some to see if i get any readings after the fact?

I have a 93 gal cube some sps and lps and softies...
my lights r radion g2 at 45% put it up higher the corals start to die.
I have 2 mp10s
1 wp 10 for circulation
cal 440
alk 9
mag at 1500
phospahtes at 5
nitrates at 0
tank is over 2 yrs old transferred everything from my 75 gal that I had for over four yrs and everything was growing and coloring fine. I dose my alk and cal with brs 1.1ml for 4 hrs. don't know y my sps and some zoas are ...

How do I get rid of these things the y r taking over my tank they are all over every piece of rock I have in the tank. I am thinking of taking the rock out and letting it set outside till summer unless someone can suggest something else I can do. plz I need help with this!!

my alk constumption high...I tested my alk a day ago and it was at 7 dkh...I added the amount needed in 2 days to bring to 9kh cuz I split it...well I tested this morning and it was back own at 7...I have a 108 gals al together 93 gal cube plus sump...I about 20 sps frags and a couple of lps and a clam and rbta....would this b accurate the amount being consumed or something im missing??

I have been using API test kits since I began my first reef 4 yrs ago. I trust the API for yrs. I recently bought a red sea pro test kit. Well I did a alk test last night and the red sea read alk at 9.8 dkh....Well I decided to test with the API and see how far off it is well it read alk at 7 dkh... I don't know which to trust far as which is correct...need a little help on this matter plz an than you..