fans

Has any one ever mounted a fan to a radion rms track mount? I want to get fans and mount them to it and have it blow down on the water. Yes i know it more effective going across but don’t really want that. But has anyone done anything? If so pictures plz

I have an almost 10 year old JBJ Nanocube 28 and a couple of parts are broken/gone bad. I don't know what sizes the items in question are to replace them with standard parts. One of the hood fans is shot and one of the return nozzles is broken and in the garbage now as well. JBJ sells...