jpete wrote:We just had ours pumped a couple years ago. First time in close to 40 years.

Most of that time, there was only one or two people living here.
Once me and my crew moved in, it really put a load(sorry about that) on the system.
The septic guy said using Rid X is fine so I've been doing that. I put it in the category of "can't hurt, might help."
jpete,
Coalkirk has shared
the most important information just above your post.
coalkirk wrote:Don't use Rid-X. That allows dissolved solids to get out into your drain fields. You didn't say how many people the system is used by. That makes a difference in how often you get it pumped. It's not expensive. I get it done every two years.
Also don't use chlorine bleach in your laundry. Use liquid soap for the washer and dishwasher. No kitchen grease down the drain. No tissues, paper towels, qtips, cig butts, condoms, feminine products, etc. Essentially if you didn't eat it or drink it, and it's not toilet paper, it should not be in the septic.
The only thing Rid X does is provide degrading microorganisms to the system and some of them might already be there. Terry already said most of this. Additives like Rid X
do not eat minerals (solids). There's more. If you rely too heavily on these products, you might be operating the system under a false sense of security** if the sludge and scum layer thicknesses are not monitored. Once the solids get out into the leach field the holes in the leach field's filtering medium, be it gravel or select fill, are gradually plugged . Then the leach field's pipes fill up next. If stuff gets into the leach field, bug additives might help clear this material before the pipes are plugged solid but it's only a matter of time since the system has already been compromised.
The flip side
question
to ask in this thread if you also have a water well or spring is: Do you frequently test your well water?
IMHO, every couple of years well water shoud be checked at a minimum for
bacteria and
nitrate levels. The fill type that makes up the material of leach field and the local soil types are the biggest unknowns for a system that you aren't familiar with. Some soils and fills will go forever without pumping maintenance, some won't. Know this; the fill placed into newer systems is there to filter out nasty bugs so they do not make it into the aquifer where your draw your potable water, water for human use. If this fails, you could end up with ill people or maybe livestock. If it gets to this point, you are looking at options that include a new well or expensive systems that will make the water safe to use. There is a large initial cost for these systems and they require maintenance and monitoring to keep them working. It's the old adage again:
Pay me now or pay me later. There are old (~100yrs old?) lake communities just a few miles from me that have these problems. NO municipal sewage or water systems exist - they're the people paid to watch this stuff. The houses have septic/cesspool and shallow wells much too close together in wet soils. They've been that way for a long time and the problems recently showing up. There's a lot of money being made by business people maintaining water treatment systems in that community.
There are just too many variables to make generalizations about septic and well systems. Know your soil, bedrock, topography, water, well depth/casing, leach field fill. That's a lot of info to have. My first house had a cesspool and was dug into glacial moraine; gravel and sand many feet deep. There were three very large Norway Spruce trees very close to the pit. AFAIK, it was never pumped out in the 53 years I know about. Water was from a shallow well - never a problem. I'm only several miles away from there now but I'd never risk that maintenance schedule here -much too thin clay and rocky soil on this granitic niece hillside. Glaciers took all that nice draining soil away from here along time ago

The take away from all this is if you don't do the right stuff, someone sometime will have to. Might be soon, might be in a long time but it probably will happen. If houses are too close together, you options are fewer.
**Anyone with a well and septic needs to ask yourself how much money do you have to gamble in the crap casino