Flagfin Angelfish (Apolemichthys trimaculatus)

Western_reefer

Reef keeper
Will a Flagfin Angelfish (Apolemichthys trimaculatus) be fine in a 90 gallon tank? Dimensions: 48" long x 13.5" wide x 30" high There will be minimal rock for more open swimming space. Filtration wont be a problem.
 
I had a young adult in a 90 and it was fine. Beautiful fish.

I'm sure you know from researching that it can be difficult to get them to eat. Mine ate everything after a time in QT. He also nearly reduced my reef to a FOWLR.
 
In my opinion a 90 gallon will be plenty of space for a flag fin (provided there is ample swimming room and few other tank mates).

I have a pair of Apolemichthys arcuatus in a 92.... (elos120xl) and they are doing very well, and I do not foresee me needing a larger tank for these two. That said, they are the only fish in the tank.

Wait till a small juvenile or sub adult pops up in the divers den and go for it.


~Michael
 
This fish needs just the opposite of what you're suggesting. It would want lots of rock and less open swimming space. It's a grazing fish and while maybe 100g could possibly be ok, 4 foot long tank just seems cruel in my opinion.
 
Like Michael said get a small one and you should be fine. I have a small one in a 120 with a 3" Coral Beauty and a bunch of basslets and wrasses. It doesn't eat much prepared food but I see her nipping on glass and rocks all day for pods.


1.5-1.75" back in Oct
100_0088.jpg


here's a recent pic
DSC_7250.jpg
 
Last edited:
Like Michael said get a small one and you should be fine. I have a small one in a 120 with a 3" Coral Beauty and a bunch of basslets and wrasses. It doesn't eat much prepared food but I see her nipping on glass and rocks all day for pods.
"doesn't eat much prepared foods" good example of why a LOT of rock is a good idea. Heaven only knows what your fish is eating, but going after pods is not the first thing one would be expecting it to be going after all day. Think algae and sponges. You say you've had the fish since October of this year?
 
"doesn't eat much prepared foods" good example of why a LOT of rock is a good idea. Heaven only knows what your fish is eating, but going after pods is not the first thing one would be expecting it to be going after all day.

Sorry for leaving this piece out above--I've about 160+lbs of rocks in the 120. Yes, received the FF from Saltwaterfish on Oct 5th for $32.
 
Last edited:
Very striking fish...I had one in the past that was about 3-4"! He was happy in my previous DT which was a 100g Regular...very similar to a 90g. Behaved and didnt pick on my Clams or LPS/Zoas.

Unfortunately, he was grazing a little too close to my Haddoni before becoming the victim!!!!

Picture%20003.jpg


_MG_0368.JPG
 
I have one in my 220. I could never imagine it in a smaller tank. It constantly swims the entire 6ft length of my tank. It never grazes on the rocks unless I have just fed the tank. It spends it's entire day cruising. It is a good 4-5" in length. Maybe you would have better luck with a juvi but I would stick with a centropyge for that size of tank.
 
I had one that would not acclimate to prepared foods. It decimated my sponge population overnight though. It left all of my corals and inverts alone in my mixed reef but it starved before acclimating to any prepared foods I tried. :(
 
Back
Top