Me, I would stock with a puffer maybe or various butterfly's. A lion would be no1 on my list (not if a puffer is in OFC)
A comet betta would be a biggy for me as would some of the less safe wrasse, maybe a scorpion or a bat fish.
Mate your options are massive.
Hang on!!! Octopus tank !!!!!
Well I think Octopus is out, my wife vetoed the Eel due to the risk of it migrating out of the tank. I'm sure Octopus are a laugh a minute, from squidgy unmoving mass in the corner of the tank to halfway down the garden taking the lawnmower apart in seconds.
Puffers worry me, the whole thought of a little nitrate grenade floating round the tank, a Betta is possible but they are quite pricey, I also looked at big Wrasse, was going to order a Lunar Wrasse but having researched it I decided not, it seems to bully everything even Tangs and Angels. Bat fish I think would be too big for a 5ft. As for the Scorpionfish family, lions are out but the tank could do with something ugly in it.
In addition to the reflection of the owner that is.
Next in was going to be a Raccoon butterfly and a Cuban Hogfish. Picking up a Vampire Tang this weekend. I have gone for interesting fish so I am already limited with relatively small Filefish and Anthias in the tank. I may still go with a dwarf Lionfish next year though. I have had lots I have considered and decided against - Lookdown Fish, Moorish Idols and Copperband based on their poor survival rate, certain wrasses and triggers due to aggression and others due to ridiculous prices.
Lljdma06 he was saying freshwater tanks are boring (I disagree there tho)
Well the analogy popped into my head and I just had to use it
, but I don't really think that. As you know I kept Malawis and had a journal about it without any spam