@Seshwan I never really talked much about the construction of my filter on this forum, basics of all my filters are pretty much a pc fan either pulls or blows through around 2"or 5cm of aquarium carbon, the filters are just made from hvac galvanized tin "joist panning" which is cheap from home depot and some metal mesh material acquired off some old electronic equipment filters that i had access to, with a bit of smaller mesh behind that such as cheesecloth just to keep the carbon in, they work well but are not 100% effective and typically get overpowered once the last couple weeks of flowering kick in, but i also run a general air purifier just for the house anyways but it helps when things are in full bloom, and there is definitely a big difference vs no filter at all.
Here are some old photos of one of the filters so you can see what i did, its just thrown together with rivets and a little bit of aluminum tape for some of the seams, and its slip over the fan and is help in place with magnets
Here are some old photos of one of the filters so you can see what i did, its just thrown together with rivets and a little bit of aluminum tape for some of the seams, and its slip over the fan and is help in place with magnets