tired fustrated and algae

[e46er]

i have a 120 G tank 40 G sump CL system euroreef 135 and a small fuge
lights are 2x150W MH bulbs replaced a month ago
light cycle is 230pm-830 pm with actintics on from 130-9


tank has been set up almost year but 3 months ago i started going out with my current gf and needless to say the tank got slightly neglected water changes became a monthly thing not a weekly thing ect ect

anyways in the past 2 weeks ive done 5-40Gal water changes thats about as fast as i can because my RODI is super slow due to my pathetic water pressure.

here are some pics of my tank as is after the 5 water changes and hours of cleaning out algae


my fuge is packed full but its all brown...........is this normal??


[IMG]http://i194.photobucket.com/albums/z76/E46Maniac/IMG_2812

stock for the tank is
2 clownfish
1- 3" blue hippo tang
1-3" foxface
1-1.5" flame hawkfish
1 toadstool
1 frogspawn
i dont overfeed i dont think becuase nothing hits the sand
parameters are as follows
salinity 1.026
Ca-460
Alk-5 DKH........this puzzles me as I have changed 200 G of water in 2 weeks and it seems to measure 8 or so when its mixing also an ELOS kit
PH-8.2
Mg- did 2 tests first one said 950 second one said 1050 both a little low but i hate this ELOS kit!
Nitrate- test kit only goes down to 5 its not that high but its a slight color change
Phosphate- test kit only goes down to 0.25 its not that high but also a slight color change
i also decided to try vodka dosing and started 2 weeks ago with no improvements so far but the algae doesnt seem to be growing anymore but its not really diminishing either...............

im going to buy new test kits for Alk and Mg becuase it seems every test i do with ELOS i get different answers
i have seachem Mg and seachem reef builder (alk) should i try and raise them up right now or wait until i get a test kit with consistant results first??
also im using seachem reef Salt

help me before i lose my mind!!!!!