Just my personal opinion: I know nothing of the laws in CT, but in Washington State I believe the use of RID-X is technically illegal. They sell it in the stores here though.
Check the Internet, especially the agencies having jurisdiction over septic systems for the best information. For example from the Connecticut Environmental Health Association web site
http://www.cteha.org/septic.htm :
• DO NOT Use septic system additives offered for sale for the purpose of correcting a malfunctioning system or improving the performance of a septic system. This includes degreasing agents, caustic chemicals, solvents, and "bacterial digestion enhancers" such as enzymes or yeast. These products can be dangerous. Many chemical additives are non-biodegradable and pass through the system into the groundwater, where they can contaminate well water supplies.