Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: I have heavy calcium in my water, do I have to change filters more often?  Currently using a water softener to remove the calcium.
Document: Purchased this February 2013.Simple install. Haven't had any problems. The system works great and filters are fairly easy to change.The water taste great also
The purchase price was reasonable and the installation (done myself) was relatively easy. The YouTube video referenced in the installation manual gives you additional information which is helpful. The unit itself is fine but do the math before you buy one. The manual sates to change the filters every three months which aren't cheap. So figure out what you're spending on bottled water every three months and compare it to the cost of replacing filters before you buy this.
I will probably need to buy new filters...but wow 2 years of pure drinking water.I just read "1 bad review for this product" - really am dismayed by what that buyer said about this item. I hope new buyers will give this item a chance.
Love my iSpring RO filter. I refuse to drink our tap water - don't trust what's coming through. We were refilling containers at the grocery store but my wife hated that because it added a lot of weight to the cart. So far it's worked flawlessly - I haven't changed the filters yet but the way I have it mounted should make it fairly easy.
Great tasting water with the alkaline filter (no taste). The price for this excellent unit was way less than what I paid for the crappy unit I purchased 15 years ago. I have been a Chiropractic Physician for 34 years and a professor of anatomy and physiology for 9 years. If you trust the purity of your water supply you are making a mistake. For minimal money yearly for filters you can be assured of pure water. This unit is a great bargain.
I'm very pleased with the quality of the unit and the water it produces. It took me about 2 hours to install it. I'm not a plumber but using the included instructions which is for a 5 stage unit I was able to complete the install. Most of the lines on the unit itself are preconnected. The instructions direct you to flush the tank once. I recommend you flush it several times. At first there was an odor to the water if I left it in an enclosed water bottle.
So far we are satisfied with the water quality and already ordered (and received) a 3 years replacement filter kit. The filters price equals the one of the previous water filtering system but at better water quality. Strongly recommend it.
Wonderful tasting water now. Somewhat easy installation. Directions could be WAY better. The connection diagram for hoses does not match this 6 stage product. So why don't they update the instructions? Why don't they update their website? You won't find a hose connection diagram for the 6 stage unit. Called customer service and they never returned a call.The main water connection is a cheap design tap that requires you to remove the cold water fitting to your existing faucet and screw in a special tap fitting. Stupid cheap design.
Filters arrive sealed, RO membrane vacuum sealed.5. Very competitive price on replacement filters.My Recommendations:1. Do not hesitate to buy because of the looks of their main website! (Product is Very High Quality)2. Install it yourself if your confident enough!!! You will get familiar with your system.3. Get the motor!!! (Its worth it, it will fill the tank faster than regular model)4.
Try calling 123 Filter... no one answers the phone, however the Seller did tell me in an email that they try to return "some" phone calls.Just received the email response to my aforementioned request for the currently advertised Free Upgrade listed on Amazon from 123 Filter, it reads.....Thanks for your email. The free upgrade is not available since last month.
Answer: yes