BigMac you can have a top flow pipe with a connection collar on the lake side end and that will let you add more pipe when needed to go down into the water. The thing to think about and the problem with a straight top flow pipe is that you lose your best water and plankton bloom through it. Even if your top flow pipe only goes down 3 ft into the water that is a big improvement. It all depends on your pond and goals and its water flow through characteristics.