Dick wrote:
Just a personal bias, I prefer more frequent changes and less
percentage. I go twice a week at 20%. The bacteria that are
established during the first "cycling" are what maintain the tank's
health. I know I have read others that make large changes, I just am
more comfortable to leave a larger percentage of "old" water and the
bacteria in that water.

Bacteria client the surfaces in your tank / filter. Water changes won't
remove your beneficial bacteria.