ok???

Looks pretty good, although your gouramis could suddenly start an all out war against each other if they're the more common males.

Clown Loaches can get a foot, and about half of that high. Atleast a 75g tank for them, but even that is small. 100g+ is the way to go, although you may refuse to leave them. They have that charm.

The shark will only get 5", but it can become territorial and attack other nearby fish.
 
i got 1 male golden gourami, 1 female opeline gourami, and male and female pearls, pearls are apparently invisible to the opeline and golden, and the opeline and golden act like a couple lol, they always swim round together,we did have a female golden but the male golden and female opeline constantly harassed and attacked her together! i dont have a clown loach, i have a clown plec!
 
and the shark in the other tank is a male, we did have a female in the other tank she was extremely aggressive, sure she thought she should be the only fish in the tank, he however swims with the congos like he is one of them, and has never shown any aggression.
 
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