ok i have 1 convict cichild male , one female pink convict cichlid, 4 danios. i never read up on if danios were a little aggresive but they killed 5 mollies, and 4 platys. so i wanted to put somethign aggresive in it with the danios did i make a bad mistake with cichild? They are in a 15 gallon tank when would i need to upgrade?also i have a 10 gallon tank in my room so how should i disperse them? like soon i want to put in more fish but i dont know what fish u reccomend any fish tht can go with cichlid wolfs look nice just any suggestions i will like ty.