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Freshwater 75 gallon here.
I noticed my tank was easier to maintain after I turned off the undergravel filter years ago. Having to vacuum the gravel several times a year was just too much. Then I added a second biowheel filter to make up for it.
I was also using a good size Fluval canister filter as the 3rd one, but that promptly broke just over a year later. I notice they have since redesigned them.
I've just got two Koi in there that actually belong outside and some tripical stuff. Also a Plecostomous I've had for over 10 years.
The Koi pretty much keep everything torn up. I put a huge Amazon Sword plant in there and they had that totally ripped up in just a few days.
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