I thought the op asked about how to filter a 300 gallon unless I misread the title. Not sure where the 1000 gallons came from.
And I don't ever pull out my media. Ever. Socks keep it nice and clean. 2 minutes to pull and replace. I do it on my food timer setting. I also choose to not see any mechanics inside my displays. I don't hide anything in a display when I have a sump and I don't do water changes on a drip system.
And a sump is NOT a filter. It is a place to put things you choose not to put in your main display, which often times includes filtration items but my fish don't fight in my sump either. As a matter of fact, the only empty tanks around here are my fry and growout tanks. All my breeding tanks are scaped and or planted. They are not a must for this breeder. To each his own but I do not keep bare breeders or use dividers. I just provide space.
Many ways to filter a tank and for me personally, sumps are the most effective way to approach it.
Nothing wrong with a bead filter as I said, but if I had do it again, it would start with a 75gallon sump. Which I have again and again. Building one right now as we speak and the sump is fully on display complete with 3d background, rocks, wood, plants and fish.
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