Anybody do this or have a link that shows how to do this? I really like Gene's 4" aerated drain, but I need two and can't afford $169 a pop. Plus I only have 2000 gallons and I will have 2 bottom drains...don't really need a 4". the Tetra 3" from AZ ponds is only $50 each. If I can convert these to be aerated, that would be ideal for my set up.