You're probably going to need to change out more than 10 gallons a week, especially while your tank is cycling. If you have to do that daily or every other day, that may be what you need to do. Are you using a gravel vac or just taking the water out? 4 fish isn't a huge bioload for a 29 gallon, so despite you going through a fishless cycling, it might end up ok. In any case, doing the water changes more frequently is definitely a better option than using the ammo-lok. I don't know how that stuff works, but it might be that it has itnerfered with your cycle. Adding chemicals like that to your tank is really never a good idea. Cycling your tank takes a while, especially going the route you're going. Do more frequent water changes. As your tank is cycling, there's no way 10 gallons a week is going to keep your fish alive. Good luck, and welcome to AA!
EDIT: Also, I'm not sure of the exact way ammolok works, but it could be that if it simply convets the ammonia to a form that isn't as harmful to your fish, your tests may still pick it up even though it's not harmful. I wouldn't count on that at all though. I'd stop using that stuff immediately and start doing more frequent water changes. Also, there are products such as Cycle or Biospira which claim to have bacteria to help your cycle along. Cycle can be found on the shelf, but Biospira will be in a refrigerator at your pet stoer, if it has it. Biospira I think is what people have had most success with, so if you want to try it, I'd call around and see who has it, and brin ga cooler with you to pick it up to keep it chilled untill you can add it to your aquarium. If you have a friend with an established tank, you can also get some rocks from their tank, put them in some pantyhose and put them in your filter. I'm sure I'm leaving something out, but I'm sure someone else will pick it up
Make sure you're using something to remove the chloring from your water too before you put it in!