Is PCTG reef safe?

[cwills75]

I normally use PETG for 3D printing, but I've seen some ads for PCTG recently and wondering if anyone has any info if this blend is reef safe or not.

 

[Fish Fan]

@Reefer Matt would know for sure what's best

 

[Matt L]

I haven’t used this filament yet, as it is newer. AI seems to think it’s good for reefing, but I’d defer to the chemical expert, @Randy Holmes-Farley for this.

 

[revoman]

Holding my breath for an answer to this one. :D

 

[servus]

I hope you're not still holding your breath :D. I hope it's reef safe, also. Will probably go with AI recommendation.

 

[Randy Holmes-Farley Verified Community Expert]

It has ester linkages that could slowly hydrolyze (break down) in water, and I would especially not use it for high pH things, such as kalkwasser contact, but the degradation may be too slow in tank water to be an issue.