, i don't mean to disagree with you, but qualify what you wrote.
yes, you can get away with 1' of flourite for plants to thrive, but once
you add fish and some water flow, 1' of gravel may simply not be enough
for many plants to establish roots deep enough to hold themselves in place,
especially if you bucket dump fresh water after a change.
, I'm glad you can afford this hobby. don't be afraid of expensive
mistakes because we all make them. best advice is to never impulse buy,
never listen to advice given in your LPS, use the search function on this
forum to learn as much as you can about developing your tank, then ask
questions on whatever issues are still unclear or not fully covered.
don't mix your gravels man, it will look ridiculous,
and one type will blend into the other over time.
just buy more flourite.