Overcrowded 29 gallon?

my cories are in a 20gal

have an 2 smaller albinos and one bandit in with a pair of swords, an upside down cat, one female guppy, one baby clown loach and one three inch c.loach. When I upgrade my tank I am thinking of either putting the loaches in the 90 or else move them to the 30gal. I am also thinking of maybe just screwing the used tank thing and buying a 135gal set up this winter. It sounds like a better idea than having two or three tanks. I know I will at least have two becouse I love the 20 gallon.
The african brown knife fish I have is not a clown knife, and not a glass knife either, so I have learned. It has no distinguishing markings or transparency- he is almost black colored. I will add a pic so you can get a better look...
Thank you all for the tips :)

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