Polymaker PETG Filament 1.75mm 1KG Galaxy Dark Grey: problems, parts and running costs
Checked: 2026-10-23
Summary
Owners most often report hygroscopic stringing, surface defects and popping when the spool is not dried, plus a reported formula change that removed the metallic finish and altered flow on tuned prints. Keeping it running costs drying time and electricity, desiccant or storage, and possible nozzle replacement for glitter colors, with no subscription or lock-in. At $24.99/kg from the manufacturer shop it sits in the $20-30/kg fair-value band; under about $20/kg would be strong value.
Common problems and fixes
- Hygroscopic moisture — owners report stringing, surface defects, popping or cracking when the filament is wet; dry at 60 C for 6 h or 65 C for 4 h and store sealed; the manufacturer recommends a PolyBox or PolyDryer. [1][2][4]
- Formula change — one owner reports the metallic finish disappeared on a later spool, leaving a flat, muted color, with flow differences where old and new filament meet on tuned prints. [1]
- Lower temperature resistance — some users report lower temperature resistance versus the older formula, though the stated heat deflection temperature is unchanged. [1]
- Galaxy glitter needs a larger nozzle — Galaxy colors require a 0.4 mm or larger nozzle to avoid clogs. [1][4]
- Bed adhesion and removal — let the print and bed sheet cool to room temperature before removal; use a release agent on smooth PEI or glass. [1]
- Batch-to-batch variation — color and finish may vary by batch. [1]
Parts and consumables
Yearly running cost
Not enough data. No annual cost figure is given; costs are drying electricity and time, desiccant or storage, possible nozzle replacement for glitter colors, and a build surface, with no subscription or lock-in.
When it is a good buy
The manufacturer shop lists this variant at $24.99/kg, with bulk discounts of 15% off four spools, 25% off six, 35% off ten or more, and 10% off a first purchase (checked 2026-10-23). Value thresholds from the sources: under about $20/kg is strong value for a high-flow PETG with documented properties; $20-30/kg is fair value where color effect, print speed and drying needs decide it; above $30/kg is weak value unless the Galaxy color effect or specific mechanical properties are required.