If you can see past the algae, you can see how the end of the filter sits half way buried in the gravel--preventing it from working efficiently. And you need a couple inches of gravel if you have live plants, so I consider that to be a design flaw.
Here's the plants and fish in the "fish only" buckets--not that you can see any of the few fish I have because they hide.
And here's the empty dirty tank. That's the submersible heater that you see in the middle of the tank. I needed to remove the live plants so I can clean the gravel decently for once! That's as far as I got yesterday.