i have trigon 190 litre tank in it i have a afican butterfly fish (i know they eat other fish but no problem yet have him a month)1 sliver dollar 6 zebia danios 6 rummy noses 2 yoyo looches (fav fish)1 common plec will rehouses him when gets bigger(only 3 inchs now)3 mollys may give them away dont like them could i add anymore i do 25% water once aweek and have done the cycle all water test reading good and have real plants pls help on adivce