Is my RBTA's Color Fading a Problem?

[Bob60070]

I have a RBTA that I got from a fellow reefer, his split. It has been in my system now since June this year. The color at the time was a dark reddish color. It stayed that color up until about a week ago. The foot of the RBTA appears to be crawling under the rock it is based on. The color of the foot is still the original color but the body where the tentacles begin is nearly white and the tentacles are a pinkish color. The color looks awesome I just hope it is healthy. It has grown in size since I've had it and it appears healthy. It eats well, shrinks up the day after I feed it a bit of shrimp or krill and then returns to normal. My tank is 75 gallons, I have mostly soft corals and a good amount of fish including a pair of maroon clowns that are hosting in the RBTA. The lighting is 400 watts of 10k PCs and 100 watts of t5 actinics. The nem is on the top rocks 10- 12 inches from the PC lights.

 

[tpvang]

I find it hard to keep a RBTA under PC lighting. Maybe it's your lighting?...possibly? i'll let others shine in on this.

 

[Toddrtrex]

Kept BTAs ( green and red ) under PCs in the past, and had no issues with them bleaching -- which it sounds like yours is doing. How old are the bulbs?

What are your water parameters ( with numbers ) including temp and salinity.

 

[Bob60070]

Bulbs 2 of 4 PCs are 3 weeks old other 2 are 5 months
Ammonia 0
Nitrites 0
Nitrates > 2.5
sg 1.025
temp 78
calcium is low 250
pH 8.3

 

[amaya]

fix your parameters ca is way low,whats your alk and mg

 

[Bob60070]

I am working on the ca now, is it bad to increase it quickly? I am using the 2 part liquid. Is there a better way without adding expensive equipment?
I will check alk and mg when I get a chance later today.

 

[Bob60070]

I have been reading somethings and from what I can see is I might not be feeding him enough. I give him some table shrimp about once a week. Should I increase that?

 

[Toddrtrex]

I don't think you are feeding it too little. Table shrimp are pretty big, I would feed smaller pieces. My anemones are lucky if they get fed once every 3 weeks.

 

[Bob60070]

I should have said that I give it slices of shrimp. He is getting two pieces that are about the size of two dimes each.

 

[Toddrtrex]

I give mine about 4 pieces of frozen krill, if you have ever seen them you know the size of them.

 

[Bob60070]

I give him freeze dried krill occasionally. If you are giving him 4 krill every 3 weeks, I guess we are feed about the same amount of food. I am just spreading it out more. So the question is krill vs. shrimp?

 

[Doris M]

I have 5 rbta and 1 huge sebae.. They are fed mysis and krill soaked in selcon every 2 days. Mine are doing well. I also know of people feeding theirs whole silversides but mine will not accept them.