jimdogg187 said:ES they don't make anymore. They were made from extruded acrylic like the ASM models. The RS is the Retail Store version of the CS which stands for Computer Store. The CS use higher quality bonding I believe. But both offer identical preformance as far as I know.
fragn'stein said:Actually CS stands for "custom skimmer" and the ASM uses extruded clear PVC not acrylic, but I do agree on performance. It's the pump and dimesions of the skimmer that it good not the materials used.
The way I understand it is the more air you are bringing in the less water is pumped, so you may have gone too big and are not flowing enough water. You could put an airline valve on it so you can control the amount of air injected and therefore have more control over the skimmer. All of this is just theory as I have not drilled either of my skimmers out.obed2010 said:I want to join. I've had an ES5-3 since January. Has anyone seen worse performance after drilling out the air intake? After drilling mine, the bubble size doesn't seem to be as fine. I had to raise the riser tube about an inch higher to get the same amount of wet skimmate it produced before.