I picked up some random acropora frags some time ago (remember, I had the red bug problem that is now over with thanks to Betadine). I dont know which kind they are. One is green and the other is a purple brown.
They dont seem to be growing at all. I was under the impression that they were quick growers. Maybe something isnt right with my tank?
I have a 20g tank with a 96W (2-12,000K , 2-Actinic) T5 light. I have the frags up on the top of the rocks about 10in from the bulbs. My flow is from a Koralia 2 powerhead and a Koralia 1 power head facing each other (the Koralia 1 is now in a bucket with some live rock rubble curing). There is an additional flow from a Fluval 305 filter (160GPH or so). The Koralia 2 is pointing up to the surface right above the acropora frags.
My water parameters:
Phosphate : 0
Calcium : 520ppm
Alkalinity : 9-10dKH
pH : 8.2
Now keep in mind, Nitrate and Phosphate ARE present as there is the annoying light brown whispy algae present that forms on the sides of the tank every few days. I am now running Clearmax in my Fluval and am adding some Cheato to the main tank as soon as it gets here in the mail.
Lighting: 12,000k bulbs stay on for about 7hours and the Actinics for 10hours. ( I cut down on lighting to combat the algae).
Feeding: I feed every other day. Mysis and Formula 1 pellets (mysis on one day and pellets on another day). Mysis is thoroughly washed in DI
water before feeding. Fish get a few bites each. Clean up crew makes dang sure nothing goes uneaten
Now, I know Acros are finicky critters, but I dont even know if they are happy. They extened polyps at all times. Thats about all I can say about them. They dont look sick (as far as I can tell), but they just havent made ANY progress since I got them a month ago. (No white tips which indicate growth).
Do I need more flow? Better powerhead placement? Longer lighting? Higher dKH
? Anything pop out at you that would be a red flag? I have a montipora plate coral that is doing outstanding nearby! Has totally anchored to the rocks and has copius new growth. A Crocea clam also sits nearby which has plenty of growth.