Gimp-Forum.net

I use my phone to read new posts, sent via a, feed reader. When I click through the reader to the, actual page the text is tiny. I have to turn my phone to landscape view, then do lots of scrolling. 

Is there a way to fix this, on my end or the web manager?

The forum software (MyBB) doesn't have a "mobile" version, unfortunately. Your phone browser has a "desktop site" option that can make the site a bit more palatable on the phone (but just a bit...)

On my phone it looks exactly the same

If you use Firefox on your phone, in the Settings > Accessibility there are options to increase the font size in Firefox