Rinse the flourite very well...or your tank will be cloudy for days. I would rinse it like 5 times.
If you could get another bag, then I would use only the flourite. Or you could just do like you said and mix it with gravel. I have about 1/3 flourite in my 55g tank and 2/3 gravel. Really I don't see a difference in plant growth in that tank compared with my other 2 tanks that have only gravel. I think a mixture of atleast half would be better...but that's just my 2 cents.
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*Kristin*
5 Planted tanks:
55g, 40g, 29g, 20g, 5.5g
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