Salt creep and algea

[Fishko]

My tanks been up for around a year now. I was cleaning it and realized i never looked at the back. By a cobweb i could see that my bulkhead to the overflow had a tiny bit of saltcreep on it. im going to monitor it but i think its been there a long time. Could this have happened when i was changing a filtersock by nudging my plumbing accidentaly. Also i have a tiny bit of algae on half of my rock but the other half is clean should i not worry about it since my cuc seems to be taking a dent of it. My phos is .03 and nitrate 2ppm.

 

[Retro Reefer]

Probably nothing to worry about.. bulkheads will sometimes leak a tiny amount at first and then self seal, I would just keep a eye on it.