Is the service company licensed by either the county or state, and do they have current liability and workers compensation insurance? What if they are injured while on your property? Insist that they show you copies of those documents.
When you called did they offer to send someone out to inspect the pool first? Not all pools are the same. Some are basic and some have very modern, high-tech, electronic control systems that the technician must be familiar with. Is he/she? Some pools would be harder to clean and maintain than others. Does all the equipment function properly?
Has the service technician, or the qualifier, attended the
Certified Pool Operators training course provided by the
National Swimming Pool Foundation? This type of training is required to service and maintain commercial swimming pools and professional technicians would be anxious to attend.
Take look the technicians' service vehicle. Is it clean and organized? The way he maintains his vehicle is a direct reflection on how he will maintain your pool.
Observe the technicians' appearance. Does he present a professional appearance? he clean and neat? Does he really look like the type person you would trust in your yard each week? Trust your instincts.
Make sure they provide all the services required to properly maintain pool. Do they test your chemicals with an approved test kit? Do they scrub your tile with a proper tile brush and tile soap? Do they vacuum the floors? Do they brush the walls with a wall brush? Do they skim floating debris from the pool surface? Do they empty the skimmer strainer basket and the pool pump strainer basket? And do they carry away the debris? Do they keep your main filter clean when the pressure gauge indicates needs cleaning? And do they use quality chemicals to maintain a safe water chemistry balance?
And about the price! Don't trust your family's enjoyment and safety to the lowest bidder!