Hi all

I purchased a couple of corals the other week, an acro with blue tips and a blue millipora. I placed the blue tip acro halfway up the tank, and the blue millipora 3/4 of a way up the tank. The tips of the acro have gone a cracking sky blue colour, but the millipora has turned Brown. Why would it do that? I have a Arcadia twin 250w halides and 2 39w T5s.

cheers
Brian

give it some time the milli is probally taking a bit longer to settle down ,also make sure the milli gets plenty of flow and keep an eye on your phosphates

Need more info but a lot of blue milli have brown polyps and often look brown when settled. What are you water test? Also is your KH stable?

Hi
parameters are

ph 8.3
KH 8
calcium 430
mag 1340
temp 26
salinity 1.0203

I tested yesterday for phosphates etc, and they were all spot on. The millipora when it was delivered, was still looking blue when I opened up the bag, stayed blue in the tank for a couple of days, and then turned Brown. Do you think lowering it down in the tank may help?
cheers
Brian

How old are the light bulbs? Also if it were me i would bump the KH up to at least 10 as you will prob get a PH swing with it around 8. What do you feed?

Might be worth raising your SG a bit.

Halides are 8mths old, I have just changed the 2 T5s last week. Have been using the Salifert coral food, flake, Mysis for the fish, also mysis for my lps.

I'm assuming the SG is a typing error well spoted Trev C and the phosphates are below 0.03 If I was you I would be looking to change my bulbs. Are you running the 14k arcadia bulbs? As when a higher K bulb starts to shift the spectrum the light loss can be a lot. I would be looking to chance my bulbs at 9 months anyway.

Hi
Yeah, phosphates are spot on. SG is 1.023. I am using the Arcadia 10k bulbs, was thinking of going over to the 14k bulbs ( someone mentioned you get better colour ) so maybe it's time for the change now. Would I get better colouring changing from the 10k to the 14k? Also, thanks for the info, much appreciated.

cheers Brian