Are 3D-Printed Frag Racks Reef-Safe?
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It is the first question every reefer asks before dropping printed plastic into a tank that took months and a lot of money to dial in: is this stuff actually reef-safe? Fair question. Here is the straight answer, no marketing fog.
What we print in
Everything that goes in your tank is printed in PETG. It is the filament the reef-keeping community leans on for saltwater because it has good chemical resistance and low water absorption, which is exactly what you want from something living full-time in salt water. We have run our own pieces for years with no warping and no cracking.
What we do not use for in-tank gear is PLA or resin. PLA slowly breaks down in saltwater over time, and uncured resin carries its own risks. (The colorful toy figurines and our logo light covers are PLA, but those live on your shelf, not in your water.)
What about leaching?
The honest version: PETG has strong chemical resistance and low water absorption, and just as important, we print with pure filament, no dyes, glow additives, or composite blends. Those additives, not the base plastic, are usually what people worry about leaching. Skip the additives and you remove most of the question.
We are not going to hand you a lab certificate or claim it is impossible for anything to ever leach, because that would not be honest. What we can tell you is what it is made of, which is more than most printed-gear sellers will do.
Before it goes in the tank
Treat a new printed piece like any new equipment: give it a quick rinse or soak in RO-DI water, then add it. That is it.
Bottom line
A PETG frag rack, printed pure and rinsed before use, is a material reefers trust in saltwater. The difference is whether the seller will tell you what theirs is made of. We will.