hey guys despratly need some help here. I had 2 swordtails 1 bosemani rainbow 2 corys 3 guppys and i bought 2 bosemani rainbows and 2 swords. One of the new swords died and a male guppy died. The 2 new rainbows have white spots on their lips. I have a 30 gallon tank with ph7.6ish and about 80F I tested the water and everything seems fine. Just dont want more death What should i do.