Hi, Shane. You mentioned you changed lighting. Were your corals doing well
before the change? I have some other thoughts on this but need more info.. If
you already posted your dKH, pH(day), Ca+, and PO4 I'm sorry please tell us
again. Hydnophora need space...lots of it. They can easily burn/melt anything
they come in contact with but can also be easily stressed. I have a parent
colony very green, nice light brown polyps. Have taken several frags from it.
I keep the parent colony med-high under 10KK MH (Ushio). Frags also under
10KK Ushio in prop tanks. They are very hardy, medium-fast growers. They like
dKH over 12, Calcium 450ish, and pH anywhere from 7.9-8.35....Acropora
generally do very well in systems with shallow flats lighting (6500K) like
Tridacna OR deeper water replication with 10K+ MH. I find (IME) they color-up
better and grow faster under 10KK crisp white like Ushios. I use no
supplemental actinic on SPS prop tanks and they do great. For Monti/Stylo I
use VHO lighting on prop. tanks....1/2 03 blue, 1/2 50/50. They color-up,
extend, and grow very quickly (weeds) under these conditions. All corals will
change somewhat under different conditions. You might just keep an eye on
water parameters and give them some time. If you are not feeding
them....start! I do not use phyto. I grind up
shrimp/squid/scallops/clams/fish to a milk shake consistency and direct feed
with an eye dropper at night. They DIG this food. You can freeze it and break
some off for feedings....Fed SPS will get fat. Not fed SPS grow tall and
skinny. Also, you can try some "Coral Heaven" available at Tropicorium and
Indo-Pacific Sea Farms....I got a free sample and like it a bunch. Have to be
carefull with it, however. One last thing....I put corals on the bottom when
introducing to my systems....I leave them like that for a week or so and then
move them higher if needed and increase photoperiod gradually (from 4-5 hours
MH to 8-14). I have found it is easier to gradually increase light
requirements than to fix a coral burnt or shocked. People tell you it is not
possible to give too much light....It can be done, trust me. Use some plexi
UV screen when introducing new animals especially. Later!
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