[mooch28]

Hey guys.

Ive been having a ton of trouble growing coraline in my tank, and have been fighting algae for a few months now. Hair and cyno (green). First off, tank specs....

-110 gallon with 30 gallon sump (built in fuge)
-230 lbs of live rock, and 12 pounds of live rock ruble in sump
- 90 lbs of arragonite.
- ASM G2 skimmer (in sump)
- Two 250 watt DE 14000K pendants with icecap ballasts
- one Seio M2600 (2600 GPH) powerhead, on Seio M1100 (1100 GPH) power head.
- 1200 GPH quite one return pump.
- 44 times turn over in total with all pumps and powerheads.
- 5 Stage R/O and DI unit. Only R/O water is used for Top-offs, water changes etc.

Fish....

1 Powder blue tank
2 clown fish
1 butterfly (forgot name)
1 coral beauty angel.
30 hermit crabs

Water paremeters.........

0 Nitrates
0 Phosphate (although test kits are inaccurate)
0 Ammonia
0 Nitrites
420-440 Calium
9-10 DKH
8.2 PH
1.024 salinity
0 copper
All parameters are pretty much constant with very little to no changes, and have been for weeks. Now i have been batteling algae, and was told my main culprit is probably phosphates that can come from live food if liquid in frozen food is not drained before entering tank since my water is otherwise perfect. So i also added phosban last night, to remove an phosphates if they are existent.

Now THE BIG PROBLEMS.......

1. Snails wont survive for more then a few hours.
- The are not being attacked or killed, they just die off within few hours or over night.

2. Corals will not open, and eventually die off. (even mushrooms)

3. Coraline has barely taken off in months. my rock looks dirty and full of ditrius, and is full of green or hair algae.

Now, i just added the seio pumps today to increase flow. Before i had the return pump and just two 270 GPH zoomed powerheads. Also, i added phosban to rid of any possible phosphates in the system. Also, ive been dosing the tank with C-balance, but just started adding regulary a few days ago. Although, even without adding it, my calcium and alkalinity have been constant at 420-440 and 9/10 respectively.

My question is, what is killing my snails, and corals, and why isnt my coraline taking off. Is it possible phosphates were doing it??? Ive heard, that even small traces of phosphate can kill snails and corals. I tested for it, but i used a hagen test kit, and have no idea how accutrate they are. As for my coraline, i figured a lack of flow, and algae all over the rock was out comping the coraline algae.

Anyways, with phosban and increased flow, im hoping my problem will be fixed, but is there anything else i could do??

Included picture of my tank below so you can see how i positioned powerheads and rock work, etc...

Thanks!!