Originally Posted by Byron
There is plenty of evidence on the positive effects of regular water changes, that was my point. There is none that says fish are better off without water changes but relying on this fancy stuff.
Nitrates in the source water is an issue. I would look into one of the products that handle nitrates for the filter.
In addition to developing a DIY Bio nitrate filter
, adding floating plants, several bottled water changes, I have used Fluval Lab Series Nitrate Remover
(FNR) in the tank filter to bring tank nitrates from 60-80ppm down to 5ppm
In addition I purchased an API Tap Water filter to make DI water for water changes.
It is my belief that with the other measures I've put in place, prudent tank/filter maintenance, careful feeding and the possible periodic use of products like activated carbon, Seachem Purigen and FNR, I should be able to reduce the volume and/or frequency of water changes with deionized water and in the end have a healthier more vibrant aquarium than would otherwise be the case....even compared to larger weekly water changes. In the end, it's all about the (aquarium) water column purity.
So I don't dispute that routine water changes with quality water are beneficial, however I can no longer afford 50% weekly water changes. As much as it was 30 years ago, activated carbon is still a useful tool in water purification. As a matter of fact, the first four to six inches in the API Tap Water Filter Cartridge is activated carbon.