Well to some people external filters are better, I usually have large sumps, since I have a 350 gallon tank, along with my 29, and 200 gallon tank, my 29 and 200 is the only one that uses a side filter.
My 350 gallon has a
sump, and an external filter to help clean my water.
I usually do frequent water changes, about every 5 days, aka every Fridays.
Also, I have a
reverse osmosis water system in my home too

and an oasis that helps with the clean water. I do use water purifiers, and I still put in aqua clear, and cycle
