I am planning on making a 55g guppy only tank. I will cover the filter with sponge and put a ton of fake plants or real plants on the bottom and allow it to be survival of the fittest. In around 3 weeks I will have my supplies. My fish have already been in there for 2 weeks and are helping to cycle the tank so in another 3 weeks it'll be pretty much fully cycled. At the 3 points the existing fish will be placed in a holding container temporarily while my 55g is totally drained because of a recent outbreak of columnaris but I hope they will all be better. It will be refilled, a sponge will be added around my filter to keep the fry from being sucked in, and the bottom will become heavily planted. At that point, I will transfer my guppy fry in there and allow them to grow. There are a total of 19 guppy fry. Once they are transferred they will probably be left in there for around 2 months. After those 2 months, I will be looking at adding some more guppies so how many more do you guys think I can add?