That frequent
water changes are always needed is definitely a huge myth and unfortunately a frequent misunderstanding. It's too bad that so many people insist upon propagating it. It is true that plants, corals and other animals require trace elements to survive however the key word is TRACE. EXTREMELY small quantities are necessary. In FW planted systems all of the trace elements ever needed are typically provided in any good fertilizer supplement and even that isn't needed much if you have really good soil in place. For the fish themselves, any good food will provide any trace elements needed.
In saltwater systems there are many different kinds of supplements on the market which all do a great job of keeping trace elements plentiful for coral and live rock. I personally like the two part system such as B-ionic. Again, for the fish themselves, any good food will provide any trace elements needed. If you eat a healthy and balanced diet, do you need trace elements in your water??? The answer is no despite what the makers of Gatorade would have you believe.
The
Aquaripure does not remove ANY trace elements from the tank. I definitely advocate doing a water change every few months for the express purpose of keeping trace elements in balance. If nitrates are not a problem this is more than enough in any tank to keep trace elements in balance. In a planted tank or reef tank you would want to use supplements just as any other person would.
One thing is certain ... a person can very safely be dramatically cut back on water changes when nitrates are removed ... and water quality will still be far superior to what it was before. Again, individual experiences will vary but this is fairly typical. Some customers may need to change water more often than others.
Please read
http://www.aquaripure.com/nitrates.htm for a more thorough and advanced discussion of this topic.
John Strawn
Aquaripure, LLC
www.aquaripure.com