Posted: 23/09/2014 at 22:47
I dont think you can have too many plants, the chappie who wrote the book I am going by says 60% of the surface should be covered.
Maybe because it was tap water, it will take longer to clear. Mine is completely clear I can see right down to the bottom of the deep bit, maybe you just need more oxygenators, they will take up the nutriients.i
When I kept ducks they only had baby baths and those shell sand pits from the kids store.