Hey, I'm getting into hydroponics and aquaponics, and I'd like to 3D print most of my parts. My main concern is layer lines trapping bacteria and making everything harder to clean.
I was looking into chemically smoothing PETG, but the chemicals needed aren't legally available for me to buy here (bummer, ik). So I started looking at ASA since it's more UV-resistant and can be smoothed with acetone.
The problem is that I've seen people saying ASA can release toxic styrene even after being left to off-gas for a few days, while others say off-gassing makes it safe. I don't know enough chemistry to tell who's right.
My main questions are:
- Is acetone-smoothed ASA actually safe for long-term use in hydroponic or aquaponic systems?
- Could it leach anything harmful into the water, especially for fish?
- Does off-gassing for a few days actually make a meaningful difference?
- Is there a better filament or finishing method for parts that will be constantly exposed to water, UV light, and possibly fish?
I'm no expert; I just don't want to accidentally poison my plants, fish, or myself lol.
Thanks to anyone who can help! โค๏ธ