Those compressors are very likely foreign made, probably china or ???.. The main thing Iwould be concerned about is where to get rebuild kits. Cheap foreign compressors for pond use may only last 1-3 years before a rebuild of the diaphragm cups are necessary depending on hours of use and depth of water for the diffusers. Do not expect to get 5-6 years of use from this brand of foreign low cost compressor. Good compressors well cared for with rebuilds should last 20-40 years. My GAST is 25 years so far on all original parts. Motor Bearings should last for 3 rebuilds.
With 3ppm DO spring water entering the pond, I would not be concerned with special aeration of this water because the dilution factor as spring water enters the pond will fairly quickly mediate the impact of low DO of the incoming spring water.
Brookwood rocking piston compressors are US Made by either Thomas or Gast.
Learn about Secchi disk or similar all white disk and use it. I will inform you about what the depth readings mean.
I agree with esshup get some current DO readings near the bottom (within 6"-10" of sediment) on a lateral transect from depths of 6, 7, 8, 9 and 10 ft moving from current T1 diffuser toward the T2 diffuser. This information will help with replacement of the T1 diffuser.
Last edited by Bill Cody; 08/20/25 02:58 PM.
