uigh...don't even start! They are like a weed!!! I had to suck some out of my tank last night. They're totally crowding out my SPS and LPS corals. I hope to rather put them in my refugium when I get it started up.
yes, be advised that in a normal softy/fish tank, they tend to grow very rapidly, requiring regularly fragging. i removed all of them from my tanks because they were just too much to keep up with
that said your standard reef tank, moderate lighting and water flow is good, it has been experienced that heavy skimming can retard there growth, which indicates they benefit from excess free nutients
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xenia is a great beginers peice. of course theres nice xenia and ugly 1z. mines never really took over my tank. its relatively slow growing in my tank. xenias flourish in tanks with a low or moderate level of nutrients in the water. some people even put xenia in their refugiums claiming that they help with nutrient export.
I have a patch that came on the rock my BTA was attached to. I've had it about 4 months and it has grown a little bit but not like crazy. I skim and have a light bio-load so maybe it is the nutrient thing. I tried scraping a piece of it off the rock while it was in the water to give some to another person with no luck. So I guess if it goes crazy I will siphon it off.
I watched the video several times. The problem is that the xenia is on the same rock as my BTA and it is really too big to take out of the tank. I tried cutting across the mat and scraping it off the rock but that didn't work, all I ended up with was xenia mush!
pulsating xenia (?) 
ryan 
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