So I want to put in a very shallow pond in my front yard in a fairly shady area covered by shrubs and a huge tree. The reason why I want a pond in the first place is because I want to place my japanese irises in there. They are now planted in the ground but the foliage is somewhat drooping meaning they aren't completely happy in soil. Anyways, I just want 3 irises in the pond without a pump. No fish. Is that possible?