I have been told that the platty ratio for male to female should be 1:2. 2 females per male. I have 2 males in my 5 gallon with 3 neon tettras, 2 emerald cories and an alge eater. I don't want to add 4 females, but would like to add 2 females. Would this be a problem? I think 2 more platties would about max my bio-load. What do you all think?