I have been cycling a 20 gal high tank and it was cycled today. Last night I added small bottle of Safe Start and today 0 nitrites, nitrate, ammonia. I have a Fluval filter that’s running and today I also added a foam filter on the bottom and 2 guppies, two cat fish and a snail. Tonight my Nitrates and ammonia are good and nitrites are the first purple color on the chart. I thought the addition of fish and new filter took me backwards. I added 4 tsp of safe start is there anything else I should do? Both guppies are ready to deliver and one had 1 fry last night, not sure if the other fry got eaten?