
... even in a fully cycled tank, you do not want to add fish that fast. this is not a 'fully cycled' tank (although I had not realized that the filter media was that old).
Adding too many fish too fast increases the bioload in the tank too quickly for the bacteria to keep up. Generally, you want to add new fish very slowly so the bacteria cultures grow accordingly. As a result, ammonia builds up pretty quickly.
You'll want to be keeping up with those 20% daily water changes. Certainly do not slack on this or ammonia and nitrite levels will become very harmful. Just for reference, I do nearly a 50% water change weekly on my tank with 1 betta and 2 very small otos. Once the tank is fully cycled/adjusted, you can go down to weekly water changes. 50% would probably be fine at that point. I actually overkill water changes on my betta tank because it only takes 1 minute to almost fully change the water when i'm using my python.
pull all of the females out, redecorate, and re acclimate them to the tank. let the 2 new females loose in the tank first. Wait a minute or two, and release the others. You want to add the most aggressive female last.
make sure you have all females too! post pics for I.D. if you are unsure.
I was telling my roomie tonight that I love having fish 'cause it's like playing with a doll house! Except the dolls are alive (in a non-scary way of cours!) LOL
Is this normal? Does this happen? When will my gals chill out? Will they chill out? What are signs that I need to look for that if it's not going to work out? How many hours/days do I give them?
Though in a way it made me feel better 'cause I thought it was just Dolly picking on all of them. I am assuming this is normal behavior? Today they all seem to be getting along better. But I am so sad to see their beautiful tails and fins torn!
How long does it take for them to grow back?
It was funny/cute 'cause the little ones were wondering what the heck the net was and why Dolly was in it!
I am still sad/upset about the ripped/torn/split fins, but I know that in time they will grow back. I am just glad that all of them seem to be getting along much better for the most part! Hopefully only things get better and better!