Why are my zoas shrinking?
Lighting may be an issue. They may be getting more than they want, they don’t open as much or become smaller if they are getting more light than they want. The lights sound like a good culprit as they are very dark blue zoas and they have lost a little color (some,not much) as well.
Why are my zoas losing color?
Under too much or inadequate lighting parameters, often times, Zoas and Paly’s will dispel and collect a different strain better apt to handle the change in the corals surrounding. Because of this, many times coloration and/or design/ pattern will be different after this transformation.
How do I make my zoas bigger?

Zoa addict Making polyps bigger has to do with lighting and placement. Get a par meter, in my tank at around 100-150 par everythin is bigger. But some like vivid rainbows like 300 par to be bigger. Bloodshots get bigger at 60-75 par.
Do zoanthids like low light?
Zoanthids, like most corals, are highly adaptive to light and will survive under very low light conditions. They will change their colors accordingly and even reproduce.
Why are my corals shrinking?
Often, the corals will shrink up, close their polyps, or otherwise show their displeasure at this sudden and drastic change in their energy source. It’s actually the billions of symbiotic algae that are recoiling, sending shock waves through their host and causing this rapid change in appearance.

How do Zoanthids spread?
Zoas are asexual, which means they reproduce from themselves. Interestingly, offspring don’t float away to start their own lives. They remain connected to the original polyp for life. Kinda like that one friend who refuses to move out of their parent’s house.
How can you make coral more colorful?
Using lights with peaks in the red, blue, pink and yellow spectrums will ensure many different colours are displayed, if already present in your corals. Using a little activated carbon regularly in a reef aquarium will remove any discoloration to the water, which would prevent the colours of your corals showing true.
How many hours of light do zoanthids need?
Zoanthids are photosynthetic coral, however they do not demand nearly as much light as many other corals. For best growth and coloration, blue and actinic color lights are ideal. Aiming for roughly 8 – 10 hours of full light, and 2 – 4 hours of ramping up/down will typically satisfy most corals, including zoanthids.
How do I make my zoas brighter?
Try placing some zoas in a little shade for a couple of weeks and see if there is an improvement on the coloration. Your Zoas may bleach if you have too much lighting.
How do you know if zoanthids are dying?
Signs of Zoanthids dying will include things like not opening for longer than is normal, discoloration, or the appearance of melting. But, these are tough creatures, so don’t give up on them even if they show these signs.