Hi new guy, welcome aboard.......First off your pump should be running 24/7
as long as the water is above 40 and 50 degrees. Second, the more plants
the better, 2 feet of water is pretty deep for iris, you should probably set
them on some sort of plant stand, milk crate, pvc stand, bricks, blocks,
something of that nature. Iris generally like between 2 and 8 inches over
them. Duckweed, if you have fish, especially koi, is most of the time a
treat to eat, that's probably where it is going. What kind of filtration
are you using, how big is the pump per gallon of circulation, and generally
the more surface water movement the better for oxygen exchange. One more
important thing to remember there are a lot more people on here that know
boat loads more than me, and any advice you receive from me is worth exactly
what you paid for it.....tee hee..........Pond looks great by the
way.....good luck ponding.......Claude