Removed the sand from my tank

[speedo]

I have had sand in my tank now for approx 2 months and my water has always gone green? I basically did large water changes took all the other bits out so i was just left with sand in the tank and it was still the same? Anyway i removed the sand and it looks like that is what was turned my water green (i cant understand why as it was aquarium sand) I want to put a substrate back in and i do like the sand so now im looking for a local supplier of pfs. Anyone else come across this when using sand or is it just me?

 

[Chasintail]

I've gotten a bluish green algae in my sand when the sun came in and hit the tank just right. I'm using PFS. Now that I have more rays, they keep the sand stirred up more and this doesn't seem to happen as much.

 

[speedo]

The sand always looked clean but the water looked terrible even though the parameters were ok. I have only got 2 motoro pups in at the moment but i defo want some more sand in

 

[Raymann88]

Is your tank in sunlight? I have used sand in my Motoro tank for a couple of years now and have had no issues. My tank is not in direct sunlight.

 

[speedo]

No its not in the sun, The tank is ok now i have taken the sand out. It must off being something in the sand even though i gave it a good rinse? I am going try and get some pfs this week and put that in.