Roots Growing Under Tiles?

[lovemy3azboys]

I have another post on this forum asking about shocking & running the filter. I have a new problem & not sure which forum to post it as I didnt find previous posts on this topic.

In the process of shocking, decided to pry some loose tiles to see if there is algae under them. I did find some but also found what looks like plant material. Anyone run into this problem?

 

[lovemy3azboys]

Well, after not finding any answers online we decided to pry underneath it all. We found there is a horizontal crack in the cement underneath the tiles that we believe has grass growing from the adjacent dirt/grass area. We removed the concrete that appears to have been added over the crack & found more grassy material. We chiseled it all & will shock at mustard level tonight in the hopes that will get it all. Once the OCLT is good we will drop the water level & fix the crack & retile.
Still hoping to hear from anyone who has seen this before...

 

[Bama Rambler]

Your plan sounds good. I don't know if you need to shock at that high a level, but it won't hurt. Once you have it cleaned out you could probably seal it with caulking until you can get it sealed permanently.