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In my tank i have two 1 and a 1/2 inch bala sharks, 1 quite large gourami, one 2inch pleco, i black molly and 9 guppies (2 male). My tank is 24inches long, and about 66 litres. Is this ok or should i start saving?!
your tank is about 15 gallons and already too heavily stocked. bala sharks should be maintained in shoals of 5 or more and although they tend to grow slowly, will ultimately reach a foot. they need swimming room and ultimately, you should keep them in a 5 foot tank at minimum.
your pleco is likely to be a "common" and will also grow to a foot. moreover, these fish are quite messy and will overload the filter on such a small tank.
your black molly is a brackish water fish and unless maintained that way, will not do its best.
start saving immediately and get a second job. a 5-6 foot tank isn't cheap. you might be better off sticking with a few small fish which will fit in your tank.you're never too old to have a happy childhood.