just a thought.
i think parents should encourage the intrests of thier children and support them in a positive hobby.
however, reefkeeping is a costly hobby and buying the stuff you need (before the stuff you want) is an inseprable part of the hobby. although it would be nice if your parents financed your hobby, there is nothing that says they should be obligated to.
your ability to financialy sustain your hobby must be part of the decision weather or not to participate in the hobby in the first place.
if $7.00 a month for premixed saltwater (3gallons a week @ $.50 a gallon) and RO for topoff (4 gallons for $1.00) is to much of a financial burden, then your in the wrong hobby!
---- what am i getting at? ----- buy the stuff you need ( purified water, protien skimmer, algea scrubber, replacement bulbs for backup, etc...) before you go looking for the stuff you want (true percula clowns, rose buble tip anemone, coral frags, etc...)
judging by the responses youve been getting lately, if you start to take more responsibility for your hobby, others would be more willing to help and guide you.