Protein skimmer?

Skimmers help remove waste from water which would be one reason to do water changes, so with a skimmer you would need to do less water changes in theory. That is the short answer.. long answer is there are many more variables to take into account on when to do a water change.

How a skimmer works. Think of it like soap bubbles you blow bubbles with. With soap bubbles you see rainbow colors on the surface of the bubble from the soap. With a skimmer, it creates bubbles and instead of soap sticking to the surface of the bubble, waste from the tank sticks to the bubbles which then rise and pop at the top of the collection cup, removing the waste from your aquarium water.

I currently do not have a protein skimmer, but, I don't have much of a bio load.

Frequent water changes can reduce the need if you don't have a large bio load as you don't seem to. They do have a purpose and I do plan on getting one down the road.

protein skimmers are highly effective if setup right. but in smaller tanks, water changes are more efficient. you don't need one but you can have one. you will notice clearer water, less odors, and happier fish.

Im running a 20G with LR, a few softies and will have a small bioload soon and I dont plan on running a skimmer anytime too soon.Just weekly water changes will be sufficient. Im also running a refugium to help with filtration.

A 29 gallon is large enough to warrant a skimmer. Any skimmer is better than none. Even a used Seaclone is worth running. In my experience dealing with a lot of different customers with a huge range of experience and setup the tanks that crash for no obvious reasons usually have no skimmer.