I've got a 4x8 flood table that houses about 40 different types of veggies suspended in net pots which are held up via some pink polystyrene lids. I've been noticing lately more and more that all kinds of pond waste (fish poop and uneaten food I'm guessing) keep gathering in the corners of my flood table. My plants seem to be fairly unaffected by this but I was curious what would happen if I just kept letting the poop gather in mass. It's not completely inconceivable for me to imagine that entire table some day being mostly fish poop and fish waste and I'm concerned that if I don't deal with it that it will start to clog my roots of my plants and possibly starve them for oxygen and open the door for root pathogens etc.

I understand that in a flower bed with grow medium such as hydroton or 3/4" gravel this isn't usually a problem as there is a vast amount of healthy bacteria that would consume this waste but in my flood table this doesn't appear to be the case.

So should I be rigging up some kind of system that filters this out before it hits my grow bed? Can I leave it and the plants will benefit/unaffected by it or should I do something else altogether. Something tells me a sump would solve this.