Your Favorite Fish For Different Tank Sizes

That Trinindad Pleco

Exodon
MFK Member
Sep 5, 2022
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Hi everyone, today I’d like to know what everyone’s favorite fish for different tank sizes (With Their Standard Dimensions) is. Pick only 1 fish type per size, but if you would like to say what else you like to keep with them in that sized tank feel free to. Also, the size doesn’t have to be that fish’s minimum tank size. For example your favorite fish for a 55 gallon could be a neon tetra. Also, please say a fish for only 1 of the following. For example, please don’t say your favorite for a 120 and a 180 is an Oscar. Please say your favorite for the following tank sizes 10 Gallon, 20 Gallon, (High Or Long You Pick) 29 Gallon, 40 Gallon Breeder, 55 Gallon, 75 Gallon, 120 Gallon, (48x24x24) 125 Gallon, 180 Gallon, and finally a 350 Gallon. (96x36x24) Also please say your favorite tank size at the end of your response. Thanks everyone, and I hope you have fun answering this question.
 

Cadillac15

Exodon
MFK Member
Mar 24, 2018
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10g - single Betta
40b - Pearl Gourami
55g - Pair of Angelfish
75g - Electric Blue Acara or a Single Flowerhorn
125g - Pair of Oscars
 

Deadeye

POTM Curator
Staff member
MFK Member
Aug 31, 2020
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10 - Betta or dwarf puffer
20 - Royal Gramma Basslet
29 - Occelaris Clownfish
40B - Red wolf fish
55 - exodons
75 - Gt or Jd
120 - Red belly piranhas
125 - Oscar pair
180 - Banded leporinus
350 - Festae pair + other cichlids
 

Fallen_Leaves16

Dovii
MFK Member
Nov 10, 2021
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<10- Caridina sp. & Neocaridina davidi (Not fish, but still)
10- Most betta species excluding splendens
20T- Butis butis
20L- Apistogramma agassizi (or some other smaller apisto)
29- Asian rummynose
40B- Can't choose between T. schoutedeni, C. asellus, and various loricaria, sorry
60B- Indian Dwarf Mudskippers
75- Snakeskin Rhombo Barb
90- Odessa barbs
120- Polypterus mokelembembe
125- Brachyhypopomus brevirostris
180- Thermometer knifefish (any species)
350- School of Geophagus pyrocephalus
Favorite tank size- 60B (the standard Aqueon one)
 

GolemGolem

Piranha
MFK Member
Nov 29, 2010
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Well I have not had all the tanks, and I sure have not had all the fish, so I'll just list my favorite fish from tanks I've ran/run.
10: guppies, though I wouldn't mind trying pea puffers at some point.
29: Either my old green spot puffer, or breeding rams.
40b: Still really like my native paludarium, it's got >10g of water in there, and the mosquito fish are my favorite.
50: I'll let you know in a few years mine went from box turtles to storage to new sunfish and minnow tank.
75: Digging my Krib colony but I got 5 otos and 6 corries in there and watching them interact is the best right now.
Still need bigger tanks. 300 stock pond is feasible and likely next. Been keeping an eye out for a 125 I can afford for years now, LFS has been trying to sell theirs for 2K for all this time (stand, no filters or lights). Still want to try my hands at a big spiny eel, and a pair of big chiclids.
 
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cvar

Fire Eel
MFK Member
Sep 16, 2010
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<10 Betta Splendis
10 Guppies
30 Cardinal Tetras
40 Angels
55 Green Severum
125 Clown Loaches
300+ I'd love to try N.America native fish (eg, Northern Pike, Yellow Perch, Northern Sunfish)
 

Natediesel69

Feeder Fish
MFK Member
Nov 22, 2021
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GolemGolem, check craigslist and facebook marketplace if you don't/haven't already. I got a 125 with stand, lids and an eheim 2217 canister filter for $225 last summer off craigslist and see insane deals on facebook marketplace on almost a daily basis. 2k for just the tank and stand is laughable though not uncommon, people tend to wayyy over value their belongings. There's some amazing deals out there if you keep an eye out, recently saw a 4'x4'x3' tall (or something like that) 300 and change gallon tank with a stand for free! The same day I saw a 6' 90 gallon which I didn't even know existed with an fx4 canister filter also free that someone else beat me to. For every good deal though there's inevitably some ******* trying to get $500 for their used 55 gallon setup
 
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That Trinindad Pleco

Exodon
MFK Member
Sep 5, 2022
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10 Gallon: Dwarf Honey Gourami
20 Gallon: German Blue Rams
29 Gallon: Red-Eyed Red-Tailed Dwarf Pufferfish
40 Gallon: Blue Phantom Pleco
55 Gallon: Anglefish
75 Gallon: Discus
120 Gallon: Red Severum
125 Gallon: Common Pleco
180 Gallon: Tire Track Eel
350 Gallon: African Black Ghost Knifefish
Favorite Tank Size: Between A 180 72x24x24 and a 180 96x18x24
 

aussieman57

Aimara
MFK Member
Nov 11, 2021
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10 gallon: Breeding pair Aphyosemion australe or Nothobranchius colony
20 long: Breeding pair Fundulopanchax sjoestedi (AKA Blue Gularis)
33 long: Breeding colony Neolamprologus multifasciatus (shell dwellers)
40 breeder: Killifish grow out tanks
90 gallon: Wet Pet Tank such as Herichthys carpintis
125 gallon: Breeding colony Gymnogeophagus balzanii
So many other choices. Wish I had room for more tanks.
 
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