how does it work?

I’m currently looking for a stronger pump to put on my eshopps nano skimmer as it doesn’t pull enough air to use my co2 scrubber, but I’m confused on what kind of pump will work with it since it’s pumping air and not water. I’m guessing it needs to be a pump with a venturi? If someone could...

Hello all I have more of a scientific question of interest, so based upon what I’ve seen from the velvet life cycle it needs a sand or substrate to infect a fish yeah? but it also is found in fish via well it being carried by them so here’s my question, say two fish are in a bare qt system can...