diff --git a/pages/11.ro-system/docs.md b/pages/11.ro-system/docs.md
index aa6d14b..36ca205 100644
--- a/pages/11.ro-system/docs.md
+++ b/pages/11.ro-system/docs.md
@@ -29,9 +29,9 @@ UV Filter
 TDS Adjuster to control the TDS (Input from before the membrane and output to after the membrane but before the uv filter)
 [https://www.amazon.in/PARIJATA-Water-Purifier-TDS-Adjuster/dp/B071GYQN8F/ref=sr_1_3?crid=14JSQBCO3GK9Y&keywords=tds+adjuster&qid=1563217638&s=gateway&sprefix=batteries+%2Caps%2C281&sr=8-3](Sample)
 Pressure tank after (35L should be fine)
-https://www.autoconindia.in/pressure-tank.html
-https://www.aventura.co.in/pressure_boosting_tanks.html
-https://www.industrybuying.com/pumps-1160/pressure-tank-4421/
+[https://www.autoconindia.in/pressure-tank.html](Option 1)
+[https://www.aventura.co.in/pressure_boosting_tanks.html](Option 2)
+[https://www.industrybuying.com/pumps-1160/pressure-tank-4421/](Option 3)
 
 line after uv tank T to ro and outlet and a high pressure switch there to turn off the ro when the pressure is high. then a T ... one to the ice machine and other to the water tank