new setup, advice appreciated

im setting up my 1st sw tank, was orig. going with freshwater but
decided it was boring.

this setup is more of a low-budget experiment. i've heard many
differnt things about small tanks, mostly its difficult.

i have a 20gal aquarium, aquaclear 150 filter, thermometer, and a 100w
marineland heater.

heres what ive done so far, kinda just did it, i learn best the hard
way..

1. dumped 20lb bag of live sand into tank

2. filled with water from tap (bad for livesand? should have premixed
sal****er?)

3. added 2 teaspoons of "jungle" brand start right water treatment

4. added 10 cups of instant ocean salt, mixing it with a kitchen mixer
attachment in my dewalt drill as i poured it in

5. added small packet of clarifier stuff that came with the sand (was
this supposed to clear the water up?)

6. turned on my filter, heater, and my two 24" 20w 9325k 950 lumen
"aqua rays" by GE bulbs in a cheap 2' shop light fixture


now im planning on letting it sit for a couple weeks, hopefully it
clears up, then get a sample tested or get a test kit, add some
(probly cheap) fish and see what happens! my goal is to keep a few
damsels and a clownfish or two.

i might exchange my aquaclear filter for a biowheel, i was told its
better but a guy at a small shop.