Hi everyone i just got a 15 gallon tank from my friend and set up with a spong filter that i sokked in my 35 gallon established tank for a day so that the spong would have some bacteria in. So i first took 5 gallons of my established tanks water and put it in the new tank then i put 10 gallons of conditioned tap water in the tank and then just set the spong filter in and the heater in and the tank is at 79 degrees. after about 2 days i tested the ph and its very alcholin but havent checked the nitrates or nitrites yet. So what i did was put 10 red rosey feeder guppies in the tank and they are living evry well and happy and not one has died yet and its been 4 days with them in the tank and they are fine so when can i put in my black bubble mollie in the tank because she looks like shes going to pop and i have 2 sword tail fry can i put the sword tail fry in with the mollie fry once they are dropped or will the mollie fry kill the sword tail fry. the sword tail fry are like 1 week old and there are only 2 because there was a hole in my breeder net and alot of them got eaten by my other fish. and can i put the mollie fry and the sword tail fry in the same breeder tank and will they live happy and when should i put them in.