Well in my fight with my dinos I needed to get a UV sterilizer. Guess what too expensive so I have an idea. Can we pull the bacteria out of the water column with some form of particle separation technique. The answer is yes and it uses a hydrocyclone. Essentially you make a tornado and particles collect in the bottom of the tornado. You collect the solids and toss them out. It's a continuous method and can be used in place of your filter socks too. No more cleaning socks. So here it is. https://www.researchgate.net/public...cyclone_as_a_maintenance_free_aquarium_filter https://en.wikipedia.org/wiki/Hydrocyclone I'm going to try and build one. This could also be used in gentler flow to collect eggs, brine shrimp.... Think about it. cleaner clearer water with no moving parts other than a pump. Like a skimmer for solids. why this is not already done I can not imagine. I guess I am about to find out. For those that want to play along get a piece of pvc and put an inlet in the side for water to flow into. Make a cone for the other end. Blast the water into the pipe and see what you get. I'll be doing the calculations and determining the right sizes. The other part will be durability as the abrasion of the particles might be a factor. Never know till you try. Hope you enjoy the idea sharing. Some may work some may not but thinking and sharing are the way I like to live. Edit: could also be used on the overflow to pull out larger stuff passively powered.