I agree, and i only do water changes every 2 weeks, and my corals do fine. I only had to do more frequent ones because my ph
was through the roof due to an imbalance in the lfs
water. Make sure you have enough watts per gallon in your tank. to determine that, divide the total gallons of the tank by the current watts in your lights. an ideal number is anything between 3 for low light corals to 5 for high light corals. But id say just resaerch it. Corals dont do much on bio-load, so if you have a reaserched plan for your corals, and you know your water parameters are perfect, you can go ahead and add more every couple of days (as long as you dont over-do it).
From a fellow coral novice