Coral won't grow

stunted

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I added xenia and green star polyps 6 weeks ago and they are not spreading. They are supposed to be a pest and grow everywhere but is not. Phosphates are very high and nitrates are between 15 and 20.
 
I think 6 weeks is not enough time to evaluate. If I put them in my tank they would sit there for about 6 weeks maybe a little longer before they started to edge out some growth.

You can drive coral growth beyond the normal time frames just by feeding heavier and changing more water so it doesn't build up. Of the nutrients corals require for growth, nitrate and phosphate are a fraction and that's what's being measured so far. If you feed your tank 3 times a week more than you normally do, and change water more volume weekly than you have, that will make a difference. Some people boost up mechanical gear to save the water change work, or use plant filters etc. More input and output grows them faster.


The nitrate and po4 aren't even really their prime source of feed that's a forum misnomer. Corals prefer living, nondenatured proteins. Although n and p are forms of nutrient assessment, what they really indicate are detritus and waste stores in the tank, typically unclean deep sand beds. It's true corals gain some benefit from those conditions, and it's also walking a fine line with algae balances as well. A system with nearly undetectable n and p but abnormally high feeding and export before the feed breaks down is ideal.

Most leave out the work part, restrict the quality feed, and control n and p via withholding... opposite of ideal.
 
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It takes time for corals to grow. If they are opened/happy you should be good.
What's the Phosphate reading?
 
Thanks. Phosphates about a 10. The way people make the growth rate of these 2 seem I thought I would have a full tank by now.
 
Thanks. Phosphates about a 10. The way people make the growth rate of these 2 seem I thought I would have a full tank by now.
Wait 10.0? Or 1.0, also yea youll see, wait 5 months youe xenia will be almost the size of a basketball
 
When I had xenia once a month I'd have to stick scissors in my tank, cut the whole head off like a chopping broccoli and flush the top as trash. 5 weeks it's back again taking over I'm going to find the white white pulsing variety and fire some up again, haven't had xenia in six yrs
 
Yeah phosphates are very high. I don't have much hair algae. How long until 5 heads of xenia become 10? I know it will differ by tank but just on average.
 
Yeah phosphates are very high. I don't have much hair algae. How long until 5 heads of xenia become 10? I know it will differ by tank but just on average.
Im not sure as it depends on tank to tank, but my case. I have it in my nano tank, and i trade about 8 full blown 3 inch plugs for boxes of salt every 2 months. So if i had to guess, id cut one stalk, and by the time its healed ready to give away it has an extra 3 stalks added on. So in my tank, if i started with 5- id have about 15-20 in 2 months
 
It does happen specially to new frags introduced to new environment. I have 1 polyp of latin lover zoas. for 1 year it grew nothing...The next year I got like 40 out of it....they grow a lot faster when happy in the environment
 

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