i have just upgraded tank from a juwel rio 125 to a juwel trigon 190 i have the following fish 5 blind cave tetras 1 buinos aires tetra , 6 cardinal tetras,4 panda corys,6 pristella tetras,1 pearl gurami,1 cae i would like to have some more fish how many more could i have in the juwel 190 ...