Teapot:
Are you a commercial pool operator? "My pool is let to paying guests..." makes me infer that you are.

Anyone in the pool business is required to very specifically state that in their signature. If you are in the business of SELLING "Passivpool" then you must explicitly say so. If you are not and are merely singing its praises in your sig, that's OK.

But again, if you are a commercial pool operator or in the pool biz you must say so--and abide by our AUP for pool pros.