I just acquired a 90 gallon tank with a large rock wall, one clown, one blue tang, and a four stripe damsel. What would be some good additions to this tank? I want to give the kids some choices so that they can each pick a fish. I would also like to have several fish and an active tank. I am fairly new to marine aquariums but have had freshwater in the past. I know a lot of times clowns come in pairs, this clown has been solo for ~5 years. Would he accept another clown?
I will add I've had this tank for over a month and water is stable, fish are happy.
In the long run that blue tang won’t be 100% happy and will need a larger tank however I assume you know that.
In terms of other fish, here’s what I would pick out of;
Lyretail Hawkfish
Forsters Hawkfish
Longnose Hawkfish
Radiant Wrasse
Silver Belly Wrasse
Timor Wrasse
Earmuff Wrasse
Babi Wrasse
Lineatus Fairy Wrasse
Naokoae Fairy Wrasse
Lubbock’s Fairy Wrasse
Roseyscale Fairy Wrasse (C. finifenmaa)
Monsoon Fairy Wrasse
Hooded Fairy Wrasse
Exquisite Fairy Wrasse (Vanuatu Var)
Pintail Fairy Wrasse
The next groups of wrasses may need to be added once the pod population rises and will need to be researched in more .
Blue Star Leopard Wrasse
Black Leopard Wrasse
Blue Spotted Leopard Wrasse
Kuiters Leopard Wrasse
Moyers Leopard Wrasse
Viviens Leopard Wrasse
Atavai Pencil Wrasse
Royal Pencil Wrasse
Small Tail Pencil Wrasse
China Tamarin Wrasse
Yellow Tail Tamarin Wrasse
Linear Tamarin Wrasse
Yasha Shrimp Goby
Dracula Shrimp Goby
Black Ray Shrimp Goby
Masked Goby
Redspotted Trimma Goby
Cana Trimma Goby
Striated Trimma Goby
Black Belly Eviota Goby
Two Stripe Eviota Goby
Binoe Sleeper Goby
Banded Sleeper Goby
Randalls Shrimp Goby
Sunset Shrimp Goby
Wheelers Shrimp Goby
Diagonal Shrimp Goby
Yellow Clown Goby
Black Clown Goby
Green Clown Goby
Warpaint Clown Goby
Red Clown Goby
White Tiger Goby
Red Firefish
Purple Firefish
Helfrichi Firefish
Exquisite Firefish
Zebra Dartfish
Scissortail Dartfish
Blue Dartfish
Pearly Dartfish
Grammic Dartfish
Flame Angelfish
Coral Beauty Angelfish
Cherub Angelfish
Flame Back Angelfish
Golden Angelfish
Rusty Angelfish
Lemonpeel Angelfish
Heralds Angelfish
Half Black Angelfish
Black Velvet Angelfish
Blue Spot Angelfish
Singapore Angelfish
Bellus Swallowtail Angelfish
Japanese Masked Swallowtail Angelfish
Swallowtail Angelfish
Zebra Swallowtail Angelfish
Lamark Swallowtail Angelfish
Watanabei Swallowtail Angelfish
Red Sea Cream Angelfish
Yellow Ear Angelfish
Flag fin Angelfish
Goldflake Angelfish
The next group of angelfish will need more research if they pick out of them;
Multibar Angelfish
Venusta Angelfish
Collin’s Angelfish
Magnificent Foxface
Bicolour Foxface
Common Foxface
One Spot Foxface
Some of these species need more research than others may so I’d recommend researching them all and seeing which ones you can accommodate for. I picked mostly easy species but the Leopard, Tamarin, Pencil wrasses all need more research than the ones above them. The last three angelfish need more research done, also another comment on the angelfish, only the swallowtail angelfish are meant to be totally reefsafe. Even some of the ones found near coral (In not so deep water) can be risky in a reef setting. Also the foxfaces will get rather large however, they don’t swim as much as a tang will. The biggest thing to watch out for is if you corner them or put pressure down on their spines, you will most likely be stung by venom. Dart fish, Gobies, Foxfaces, and Wrasses all NEED a lid otherwise they will jump.
Eviota, Trimma Gobies and SOME Clown gobies can be in groups. Trimma and Eviota prefer smaller groups of 3-5 in small tanks. In a 4’ tank you could potentially have several groups of different species. I have an article about Gobiidae and where they live in the wild compared to captivity so you may want to read through that.