Yep,-like-Sponge-and-Poetic-said,-the-powerhead-is-just-a-water-pump-basically......You-remove-the-airstone-and-top-of-the-UGfilter-riser-tube-and-put-either-one-or-two-powerheads-on.(one-on-each-riser-tube,-or-as-Sponge-said,-you-can-use-one-by-blocking-the-riser-on-one-side...Remove-gravel-around-the-unwanted-riser-tube-and-stuff-with-something-so-gravel-can't-get-in-the-hole)...Personally,-I-would-use-2-PH's........Powerheads-can-create-a-lot-of-current,-so-there-are-ways-to-reduce-the-flowrate-if-there-are-fish-that-are-bothered-by-it........Danios-and-sharks-will-enjoy-a-bit-of-current-in-the-tank-and-will-usually-play-in-the-PH's-outflow.......A-heavely-planted-tank,-whether-fake-or-real,-will-also-slow-the-current-PH's-create........If-you-do-end-up-with-1-or-2-powerheads-and-there-is-too-much-current,-I-know-a-couple-tricks-that-will-allow-you-to-use-powerful-PH's-and-at-the-same-time-reduce-the-current.....One-of-these-is-to-get-a-(or2)-PH's-that-have-water-deflectors-attatched-to-the-outflow-and-you-can-deflect-the-water-toward-the-surface(make-sure-yours-can-deflect-up.....Some-only-deflect-down)......Another-useful-feature-your-PH's-should-have-is-a-little-air-tube-by-which-the-powerhead-can-also-suck-in-air-and-mix-it-with-the-water-creating-an-excelent-stream-of-bubbles-called-a-venturi.......If-you-get-2-PH's-and-everything-you-do-still-doesn't-slow-the-current-enough,-let-me-know-and-I'll-show-you-what-I-did.......Powerheads-are=pretty-cool-if-you're-a-motor/pump-nut-like-me......Keep-us-posted....PK

Until your tank is cycled...do like 25-35% water changes every like 3rd day...you will still get an Amonia reading but the fresh water helps the fish in the tank...amonia is caused by overfeeding...leaving uneaten food in your tank and the fishes waste...so cut back on the food and when your tank is finally cycled you can feed them a little more...That is what most new people do...is overfeed their fish...good luck!

good to hear your amm and nitrates are under control... nitrites are a bit harder to bring down, but water changes will do just fine, so keep that up. Also, don't be afraid to miss a day here and there for feeding, it's difficult to starve a fish.

For the gph on the powerheads, it should be enough to push the water from underneath your filter plate. I use two aquaclear 20 powerheads, each has 126 gph, so about 250 total, which is about 12x my tank size. You could do anything from around 300 gph on up, more wont hurt if you get a powerhead that allows you to adjust the flow rate. Aquaclear allows this, and also has venturi feature and also has deflector so u can point the flow in certain directions, but other brands are also good.

As-for-table-salt......It-contains-iodine-and-this-is-generally-considered-poisonous-to-fish.....I'd-go-with-sea-salt-or-aquarium-salt,-and-I've-seen-that-at-Wallmart.....

There's not enough iodine in table salt to poison fish. It's perfectly safe:

http://aquafacts.net/components/com_mam ... ated_Equal

Seriously. Save your money. And If the thought of adding iodine bothers you that much, just buy Morton's Plain salt - no iodine.