I agree with snoce...have you done some big water changes in conjunction with RINSING OUT your filter media? (I rarely if ever replace my filter media...that alone could be causing a bacteria bloom.) New tanks have a tendency to be cloudy sometimes, and it just goes away after awhile. Chemicals rarely if ever solve something...its just wasting money on something that will keep coming back if you dont figure out what the cause is. For instance ammolock (which btw has NOTHING to do with cloudyness whatsoever) costs money, you put it in your tank/filter and it supposedly makes ammonia safe for your fish. If you cycled your tank properly you would know that your ammonia is completely gone after a couple of days naturally and will never come back unless you overstock the tank or increase the bioload immensely. Instead you put ammolock in and it gives you false readings for a very long time and you never quite know what the deal is.
If an overage of some type of mineral isn't the cause...and you do regular maintenance (25+% of water every week including gravel vaccuuming)...I'd do a couple of big water changes 50%+ and then do a blackout for a couple of days. If its still cloudy, you could try some fresh carbon in your filter for a week or so...to see if it will pull out whatever it is. If that doesn't work then you could try a particulate clear product like Pclear (made by hagen) that clumps particles together so a filter can pick them up more easily. The only time that will work though is if you put a brand new filter cartridge in, add the product, wait the reccomended 24 hours, do it again if necessary, and then completely change the cartridge again. BUT it doesnt sound like your cloudyness is really that big of an issue...it could just be minerals or dirt in your water...so I'd go through all the factors first and see if you can find the cause before trying any 'magical' cures.
ReverendShmoove - I would just do your research right here on MFT. Once you decide what you'd like to buy you can always check out
www.bigalsonline.com or
www.petsmart.com or your local stores to do some pricing. If your problem is cloudyness...do a search on MFT for other people with similar problems...because a LOT of people have issues with this. Dont feel like you have to reinvent the wheel.