Why are my corals not closing up at night?

[Reef Devils]

I have got 2 new corals. Had them for 2 days now and they have been opening up fully. The 2 nights I have had them they have not fully closed and are still almost fully open. The lights have been off for about 3-4 hours. The two corals are a Duncan and a frogspawn.

 

[SnazzyUrchin792]

I have got 2 new corals. Had them for 2 days now and they have been opening up fully. The 2 nights I have had them they have not fully closed and are still almost fully open. The lights have been off for about 3-4 hours. The two corals are a Duncan and a frogspawn.

I have (or had) both of these corals and neither closed up at night for me. I’m interested to see if anyone has an exact reason why.

 

[tbrown]

Some corals actually open more at night for feeding purposes.

 

[Reef Devils]

Some corals actually open more at night for feeding purposes.

Should I feed them at night?

 

[tbrown]

Should I feed them at night?

You shouldn't have to feed most corals. If there's enough stuff floating in the water column and they get proper light levels they'll be fine without too much in the way of supplemental feedings. I never spot feed my Duncans and only broadcast feed the entire tank once every week or two and my Duncan has gone from 2 mouths to 15 or 20 in the last 8 months.

 

[Kmarshall168]

Some corals actually open more at night for feeding purposes.

Lobophyllia comes to mind where it's tentacles actually come out 11pm-3am for me

 

[Reef Devils]

You shouldn't have to feed most corals. If there's enough stuff floating in the water column and they get proper light levels they'll be fine without too much in the way of supplemental feedings. I never spot feed my Duncans and only broadcast feed the entire tank once every week or two and my Duncan has gone from 2 mouths to 15 or 20 in the last 8 months.

Do frogspawns eat like Duncan’s do?

 

[tbrown]

Lobophyllia comes to mind where it's tentacles actually come out 11pm-3am for me

Bowers do the same. My Micros and Favias usually open up at night and several of my Acropora put out feeders at night.

 

[tbrown]

Do frogspawns eat like Duncan’s do?

All LPS have mouths and will eat. Technically all corals have mouths and will feed, some just require more microscopic feeds.

 

[Kmarshall168]

Do frogspawns eat like Duncan’s do?

They can but not big food, phytoplankton would work for a small target feed. Look up frogspawn on tidal gardens. Usually have a great guide for care per species

 

[Kmarshall168]

And even just looking that up I learned that they can eat mysis haha always do your research

 

[Reef Devils]

They can but not big food, phytoplankton would work for a small target feed. Look up frogspawn on tidal gardens. Usually have a great guide for care per species

Ok thanks

 

[Reef Devils]

And even just looking that up I learned that they can eat mysis haha always do your research

Appreciate the help

 

[Roatan Reef]

Appreciate the help

I have a type of Cup Coral that came with a piece of live rock from Tampa Bay Saltwater, and it's super active at night, even when lights off, in fact it's at its largest in the dark. Some corals just do their own thing whenever they want. Enjoy it!

 

[kevgib67]

I spot feed my torches, frogspawn and hammers twice a week mysis. I used spot feed my duncan, great feeding response, but stopped trying to slow down the growth of new heads, taking up a lot of real estate. This is a no branching type and I will eventually have to figure out how to frag it.

 

[Reef Devils]

I spot feed my torches, frogspawn and hammers twice a week mysis. I used spot feed my duncan, great feeding response, but stopped trying to slow down the growth of new heads, taking up a lot of real estate. This is a no branching type and I will eventually have to figure out how to frag it.

Can you send a pic of what food I use to feed frogspawn. I tried feeding it phytoplankton but it did not close up. Then I got some of the Rods food and dropped a piece on to it. It did not close up and eat it like the Duncan’s.

 

[tbrown]

Can you send a pic of what food I use to feed frogspawn. I tried feeding it phytoplankton but it did not close up. Then I got some of the Rods food and dropped a piece on to it. It did not close up and eat it like the Duncan’s.

Frogs, Hammer s, and Torches don't always close when they eat.