Growth problems

[Checkitout]

Ok I have a 105g 4ft tank that has been set up for 2yrs now and I'm not getting alot of growth out of the corals. I have mainly sps and acans in the tank. Some of the sps I've had for a year and half now and have only grown about a 1" or so. The colors of the corals are awesome but no growth. All my water parameters are spot on. My lighting is dual 400w halide, m59 ballast, with xm 20k. I was doing water changes, about 24gallons per week, but I cut that back to every other week about a month ago because someone suggested to do so. Please help me with any suggestions.

 

[Blackhawk Fan]

Do you have any soft corals in there?

 

[Checkitout]

nope no soft corals.

 

[dakotasreef]

It is hard to say for sure, but what about the basics. Salinity, temp, ph, calcium, alkalinity, mag, trace, feedings. Do you dose or just do water changes. From what I understand 20k bulbs are not ideal for fast growth, but some of the corals should grow more than that.

I think for optimal growth, stability is the key.

Some corals are slow growers also.

 

[DCG1286]

Also I think some pics will also help your thread tremendously if you have them, just to compare when you started to what the tank looks like now. Just a thought.

 

[stunreefer Verified Sponsor]

Moving coral (to another area of the tank), messing with flow, adding new equipment; Anything that doesn't pursue stability (not necessarily parameters) will hinder growth. Keep your hands out of the tank and just let her ride

 

[Checkitout]

Salinity-1.026, ph- 8.2, calcium- 450, mag-1300, alk- 9. I do dose with aquavitro calcification, ions, fuel, and with seachem marine buffer & builder. Some of the sps I have are eric's red stag, atl ultimate stag, pink lemonade, ATL Purple Bonsai, Rommel's Watermelon Acro, The Ultimate Superman acropora, just to name a few.