I have good luck with Amazons filament both PLA and black PETG but the only advantage to it is cheap shipping.
Regarding the cup. Just watch the dimensions if you do the tall version. I am not completely familiar with that 3D model but Red Seas original in a Red Sea sump doesn't leave a massive amount of room between it and the bottom of the sump. A couple of inches at most, so the "colander" would need to be fairly shallow. The short one would be fine though.
Regarding print settings, don't be afraid to fail and tweak. What works for someone might not work for you because of modifications. Mine isn't an Ender 3 (remixed Ender 3 Pro basically) but I found I need to print PETG slow. Max 40 and need 80/75 bed and 240 on the extruder.
Regarding the cup. Just watch the dimensions if you do the tall version. I am not completely familiar with that 3D model but Red Seas original in a Red Sea sump doesn't leave a massive amount of room between it and the bottom of the sump. A couple of inches at most, so the "colander" would need to be fairly shallow. The short one would be fine though.
Regarding print settings, don't be afraid to fail and tweak. What works for someone might not work for you because of modifications. Mine isn't an Ender 3 (remixed Ender 3 Pro basically) but I found I need to print PETG slow. Max 40 and need 80/75 bed and 240 on the extruder.
