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Without looking the 3 species up and just making a rough guess of 2" of mature fish body for all of them then you'd be about out at 25" of fish body, meaning you are basically at full stocking for a 29 US g tank.
What you really need to do though is find each species in the individual species sections here on TFF and check what size they can grow to when they are mature. Some of them might grow larger than my 2" guess.
You are working against the "1 inch of fish body per US gallon guideline" and if your findings push you a little over then you can ask yourself whether you are able to over-filtrate. If you start to go up towards 2" per G then you are in trouble and you need to think about re-homing some of the fish.
~~waterdrop~~
P.S 4 x 1 isn't 1 its 4