I have 5 albino cories, 3 female diamond tetras and 3 ornate (candy cane) tetras in a 45 gallon tank with an aquaclear 70 and 2 double sided sponge filters. I also have a bunch of plants. I’m having trouble finding more diamond tetras but I found candy cane tetras so how many can I add? The 3 female diamond tetras get along well but should I try to get more anyway (I would only get females)? If so how many? Should I have an aquaclear 110 instead of the 70? Thank you!