1 It's more yellowish than the other greens of St. Patrick's Day. 2  Some shade of yellow or Gold is sometimes improperly used in place of the orange in the Irish flag. 3  Gold is the color of the coins in a Leprechaun's pot o' gold at the end of the rainbow. 4  It may be called gold or golden yellow.
If the filter pressure continues to run high with reduced water flow to the pool, the pump may be moving more water than the filter is designed to handle. Check the flow ratings of both the pump and filter to ensure they are sized correctly. You may have a blocked or plugged return line.
Quick Answer. Pool water turns brown due to high iron levels. Water from certain sources, such as wells, contains dissolved iron that oxidizes readily and turns brown when in contact with air. Acidic pool water, on the other hand, deteriorates metal equipment in the pool, introducing excess iron into the water. Continue Reading.