i have a 29 gallon tank with the following 3 1 in convicts 2 black 1 pink, 1 2 in red tiger oscar, 1 two in mid grade flowerhorn, 1 3 in red tailed shark, 2 2 in giant danios, and 1 4 in common pleco, i know i need a bigger tank but what is the bare minnimum size tank for these guys two be happy.