hi im new to planted aquariums i have a 60 gallon tank its two weeks into its cycle. I was told by my fish store to use black mollies to help through the cycle, now i have 15 babies in my tank and all the adults died (6) of them to be exact i tested my water and everything came back great except for my PH which was at 7.6. so i guess my question is this where do i go from here, thank you for reading this any help will be greatly appreciated.