I have a small duck pond (one of those landscaping type ponds) for 4 ducks. I usually dump and refill it twice a week. It takes about that long for the algae to start growing and the pond turns bright green. I would love a long term solution but right now I am needing advice on how to keep the algae at bay for a week while I go on a family trip. I have someone coming over to check on things but don't want them to have to deal with the pond. I have pool alcaecide, would a little of that be ok? What about barley Straw? Thanks for your help.