ok, could u link some good dosing things(under 30$, preferably under 20$ plz)and some good test kits for those thats not 60$ for all 3Also, you may or may not need dosing. You will need to test weekly to understand what the tank needs.
Small bio/coral load tanks may only need routine water changed to keep things in check, but as others have stated the tank will get to a point when that is not adequate on its own. The way to know is by continued testing.
For instance, I have a low demand system and I only need to dose alkalinity and calcium. I confirm my dosing schedule each week when I test parameters. If alkalinity is lower than the week before then I bump my dosing up to accommodate the consumption in the tank