How long are these diatoms going to last?

[whitasm]

For reference I’ve had my tank set up and going since august 20th. I noticed the diatoms about 3 weeks ago and as of Sunday cleared off the rocks almost completely. Now we’re right back to where I was before, just 3 days later. I have provided pictures of the tank when the rock was cleared on Sunday and now. Any ideas as to how long this lasts I understand it is part of the process but just curious as to when it’ll slow down. I am using RODI water from a new system I got about 2 months ago.

 

[Cpc83]

Are you using rodi from lfs or making ?