3D Printed DI Tamper

adhd_nerd · Apr 2, 2015

Hi I posted this in dry goods 4 sale. But maybe should have posted here as well for those w/3d printers.

I made this using a 3D printer I built from kit and modified that I received over x-mas. Some in my local reefing group found useful so thought I would share. It is available on Thingiverse.

[video=youtube;Z6hEhIGmwcw]https://www.youtube.com/watch?v=Z6hEhIGmwcw[/video]

Windy · Apr 2, 2015

You might explain what it is.

adhd_nerd · Apr 2, 2015

I thought it was pretty clear what it is for. But I guess if you've never packed your own DI cartridge (or made your own expresso

).then it may not be clear. So I'll explain.

The tamper is to pack DI resin more tightly into the DI cartridge. Usually when people pack DI cartridge, they just tap the cartridge against the table and let gravity do its work. It turns out this technique never as packs the cartridge as what you may get when you buy a pre-packed DI resin cartridge. The tamper is used to push on the resin when it is filled to the top to compress it more allow for a more tightly packed DI resin refill.

Windy · Apr 3, 2015

I have never lived somewhere where DI was required. Right now my water is incoming at 23-24 TDS and after the RO is zero.

AZDesertRat · Apr 3, 2015

It may be an indicated 0 but RO by itself is only a 90-98% efficient device so 0 is impossible. With such low tap TDS you are probaly below the 2-3% of full scale accuracy of your meter but there is still TDS there. Then there are things RO is not particularly good at removing and are weakly ionized so may not even show up on a hobbyist grade TDS meter such as silicates, nitrates and phosphates and that require DI to polish off. Even with low TDS I would still use DI if you are serious about reefkeeping.

Windy · Apr 3, 2015

AZDesertRat said:
It may be an indicated 0 but RO by itself is only a 90-98% efficient device so 0 is impossible. With such low tap TDS you are probaly below the 2-3% of full scale accuracy of your meter but there is still TDS there. Then there are things RO is not particularly good at removing and are weakly ionized so may not even show up on a hobbyist grade TDS meter such as silicates, nitrates and phosphates and that require DI to polish off. Even with low TDS I would still use DI if you are serious about reefkeeping.

I began reefing in 1996. Is that serious?

evolved · Apr 3, 2015

Please be respectful as this thread continues; thanks.

printerrob · Apr 3, 2015

Are you selling and for how much total to ship it to 17349, I would like to start refilling my own DI in the future if I ever set up my 150g.
TIA

adhd_nerd · Apr 4, 2015

printerrob said:
Are you selling and for how much total to ship it to 17349, I would like to start refilling my own DI in the future if I ever set up my 150g.
TIA

Pm sent. I am selling for minimal $. I wasn't sure this is the appropriate place to mention since it is not a 4 sale section.