Jennifer called from the greenhouse that Avery tried to deliver the Modine heat exchanger. I called Avery and said I would do a pick up. Hooked up the trailer and went to Morrisville and got the heat exchanger then took it to the greenhouse. It's huge. Lots of packing all around it. Carried it down the aisle to where the heater is but did not work on it. The greenhouse was busy with JoAnne Raymer, Joann Hoover, Jack Shannon and Jennifer. Libbie stayed home to do book keeping. I went to Home Depot and got one inch fittings and built a new water distribution system inside the bio filter. Since the pump is 1800 GPH into 1 inch tubing I didn't think restricting the flow in a 1/2 inch pipe was a good idea. The plan is to use 1 inch distribution pipe inside the bio filter. The one inch feed to the biofilter will have a 3/4 inch tap for the waterfalls which will allow me to use one pump. I'll put the existing bioballs into the new biofilter. Today I finished painting the output pipes of the biofilter black. Dinner was a bean burger and salad.