Up until recently I have had no issues with water circulation in my pool, but then i had someone come visit who just so decided to toggle with some of the valves on the system. Since then, my pool has only had a flow of water going out of one head in the pool and that would be the one where the step is in the deep end. This issue is allowing my pool to become dirtier than I want and I don't know what I need to fix the issue. I have taken photos of my system and will add them below so that hopefully someone can help me with an easy fix.
Sand Filter: http://i.imgur.com/u4bXm1X.jpg
Water Pump: http://i.imgur.com/46573A8.jpg
Pair of Valves: http://i.imgur.com/vuhxNKS.jpg
First Valve from System: http://i.imgur.com/vKrF0an.jpg
Valve at Water Pump: http://i.imgur.com/kABQvbR.jpg
Whole System: http://i.imgur.com/FUHRdnQ.jpg
If you have any more questions please ask. Thank you for your time and I hope you can help me solve the problem.