We filled our pool this spring with water that had a lot of iron in and so got that cleared but couldn't get it clear. About 2 weeks ago it started to get a green tint and just this week we started getting more serious about getting it cleared. We are testing the water 3 x's a day and adjusting things daily. We had been slack in keeping the chlorine level up before this happened. How long does it take till we see a difference in the water. we have been putting algaecide in every few days and vacuuming every day or 2. Any suggestions.