Hi! I have a 20 gallon tank with 3 mollies, 3 platys, a BN pleco, and nerite snails. I usually siphon the tank every week and my filter is the one that came with a tank. (Its either Tetra or Aqueon). Recently I found fry in my tank. There were only two left by the time I found them, but I moved them to an extra tank and set it up with a filter and heater. I was wondering if there was any way I could keep the fry without there being too much ammonia and nitrite. I already have matrix in my filter. Would I be able to keep them if I upgraded the filter? Or is there media I could add?