that stuff is in lakes and rivers and the fish still thrive.
Lakes and rivers also have a lot more water volume per fish. Not arguing, just food for thought.

that stuff is in lakes and rivers and the fish still thrive.
um a spike of what exactly? and no i just thunk it up on my lonesome. i mean call me crazy but that stuff is in lakes and rivers and the fish still thrive. i understand that it isnt the exact same thing but i cant see it hurting. any one have any viable information? not just opinions please. any one else do this? i kinda like the planarea or how ever else you spell it. my fish ate it up last time i had it.
the only reason I would say you should be vacuuming your gravel is due to the build up of anaerobic bacteria. as some roots decay and other wastes collect, you can quickly get this bacteria to colonize. Eventually, the substrate will be disturbed the toxic gasses can be released into the water and this is a very fast way to kill off all your tank mates.
In one of my tanks this happened once, as my cleaning of that one tank was less than ideal. I came home to my entire home reeking of Sulfur. and it took me airing my home out and doing 2 massive water changes to get rid of the odor and make the tank safe enough for fish again.
I used to hate substrate vacuuming. Now it's really fun to vacuum thanks to an Eheim Sludge Extractor.