strips can be inaccurate-try buying an API master freshwater liquid test kit. if the pH and alkalinity are high, the platy's should do ok, but the neon fish are questionable-do u mean neon tetras or neon rainbowfish? neon rainbowfish actually prefer hard, alkaline water but neon tetras need soft, acidic water.

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I'm so sorry I haven't been on the forum in so long! Don't worry, I haven't forgotten this lovely website! I moved to a different county back in May 2011 and started high school in a totally different school district. So I'm still adjusting and studying hard, and don't presently have any aquariums. But once I do, I'll be right back on this forum!