excel is way worse for your tank than h2o2 so you shouldnt be concerned with it. both work equally as well, h202 is just WAY cheaper. for h2o2, turn off all water movement and dose 3ml h2o2 per gallon with a syringe on the bba
uncle neds is expensive but they always have top notch fish. check out their website http://unclenedsfishfactory.com/. they'll ship to you too i think. look under their forums and you'll see lists of what they have and are getting. you can also post requests.
you have to set a price, forum rules. they'll close your thread if you dont
im intersested in the lifegaurd. do you have any other info on it? how many gph, what size aquarium is it rated for?