I have the following fish in my community tank: 2 Red Tuxedo Platys 2 Rainbow Platys 6 Praecox Rainbows 6 Panda Corys 1 German Blue Ram I noticed that the water temp recommendations for the Ram are 78-85F. The highest recommended temp for the Platys is 77F. I run my tank at 76F-78F. Does anybody think that this will pose a problem for any of the fish? Should I run it a little warmer? Also, for the above-mentioned fish, are there any good vitamin supplements that I could add to the water, or will they really not do any good?