# Changing tank resin designation? **URL:** \ **Category:** Support & Troubleshooting\ **Created:** [August 19, 2016, 7:56am UTC](https://forum.formlabs.com/t/changing-tank-resin-designation/9319 "2016-08-19T07:56:02Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Will\_Howden](https://avatars.discourse-cdn.com/v4/letter/w/f07891/32.png) [@Will\_Howden](https://forum.formlabs.com/u/Will_Howden)\ **Post date:** [August 19, 2016, 7:56am UTC](https://forum.formlabs.com/t/changing-tank-resin-designation/9319/1 "2016-08-19T07:56:02Z")
So I have two tanks that have had about 1 litre of resin through them. One clear and one black. I now have V3 of each but want to use the old tank which is V2, happy to discard to old V2 resin if needs be… Is there a way to change the old tank to V3?? I hope that make sense. Will ---
**Author:** ![Frew](https://avatars.discourse-cdn.com/v4/letter/f/c0e974/32.png) [@Frew](https://forum.formlabs.com/u/Frew)\ **Post date:** [August 19, 2016, 2:32pm UTC](https://forum.formlabs.com/t/changing-tank-resin-designation/9319/2 "2016-08-19T14:32:37Z")
Unless you have access to super-secret resin I wasn’t aware existed, I suspect you’re going from V1 to V2 rather than V2 to V3. As long as you thoroughly clean the tank before using a different resin, you should be good to go. The machine will alert you that the tank had previously been used with a different resin but you can confirm that you’ve cleaned the tank and want to switch resins. The recommendation of using a separate tank for each different resin is largely based on it being a bit time consuming to clean out the tanks. ---
**Author:** ![Will\_Howden](https://avatars.discourse-cdn.com/v4/letter/w/f07891/32.png) [@Will\_Howden](https://forum.formlabs.com/u/Will_Howden)\ **Post date:** [August 19, 2016, 8:23pm UTC](https://forum.formlabs.com/t/changing-tank-resin-designation/9319/3 "2016-08-19T20:23:08Z")
Hah, yes good spot. Sorry V3 on the clear and V2 on the black… Many thanks for the answer… Will ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/3X/5/b/5bc2bdf993ff27c2e0eecab5010b25626fbb327a.png) [@system](https://forum.formlabs.com/u/system)\ **Post date:** [September 2, 2016, 8:23pm UTC](https://forum.formlabs.com/t/changing-tank-resin-designation/9319/4 "2016-09-02T20:23:18Z")
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