The other option, instead of the RSM 250

[Stingray12]

I can easily find a smaller eel, say the goldentail.

 

[skene]

skene where are you getting your info?

a 3 foot eel should never be kept in a 4 foot tank.. that's like being locked in a large bathroom for the rest of your life

and morays aren't omnivores and rarely scavengers (in fact hardly anything is as aquatic life rots so dam fast)


"should be put into consideration as they grow they will need enough room to not feel limited to the amount of space that is given to them."
like a 3 foot eel in a tank 25% larger than it is?


just as an aside why did you mention marine bettas when talking about messy fish at the end?

they are cavitation feeders and swallow small food item whole, that doesn't make a mess

big eels, puffers, triggers, sharks and the like who actually bite off food are the mess makers


the tank would be fine..

there are people who do more with less..
it's not exactly like he's talking about javanicus eels and titan trigger here...



if you're up for the extra spendature a 180, while only being 30 gallons more, is much wider than a 150 (which is just a 125 but taller)

Once again, the information that you perceive keeps your thoughts one dimensional.

An eel, as you know is unlike a fish. While you read a 4ft tank, you clearly missed the part being as wide as possible. Keep in mind that width is always more important. A 55 gal long tank, would not be an ideal tank, whereas if the 4ft tank was 2 ft wide, it would be more ideal than a 12" wide tank.
Now, while a marine betta can swallow fish whole............ Have you thought about the amount of waste that the fish itself produces? The more you consume, the more you crap. What part of that is difficult to understand. I was not referencing that the fish is itself a sloppy eater.
Now I can continue on and on.

 

[Weylin]

Here's what i would stock the tank with..

Radiata or Antennata lionfish, Snowflake eel, Yellow tang and maybe a wrasse..