Skimmer overflowing after water change

[YNWA97]

I have a bubble magus 7 skimmer on my red sea reefer 350 I just did a 10 gallon water change for the first time on this tank its been up and cycling for a few months only have a few fish in it. Any reason for this? Clean mixing bucket, fritz salt, same salinity, no additives and stable temp etc

 

[PeterC99]

Did you use RODI water for the change?

 

[YNWA97]

Did you use RODI water for the change?

Yes 0 TDS on 2 different meters also

 

[gabrieltackitt]

I’ve had this happen on IO before, I’ve always wondered if it has to do with the anti caking agent in it. Switched to Red Sea and haven’t had any issues since.