Sunday is tank maintenance day. Did 50% water change on both my 29 in the living room and the 45P in the bedroom. As the day went on both tanks started turning red. Added carbon to the the Fluval 107 and used an extra Eheim 2011 as a media reactor for the 29. The discoloration continued to get worse. Then I decided to do another water change 75% on both. Water is still pinkish red. Leaving the carbon running on both overnight. I have never seen anything like this. Found the reference below on liveaquaria.com. Also included a picture of the 29 after the water change. The python was filling towards the right side of the aquarium and the two waters didn't mix.
On a plus side the fish seemed extra happy. Great color and very active
RED OR RUST-COLORED WATER
Discoloration due to mineral-rich source water containing iron (i.e. well water). Aquariums with high oxygen levels may experience a more pronounced discoloration (redness) due to the oxidization of dissolved iron particles. High levels of minerals, such as iron and silicate, not only discolor the water but also provide nutrients that spark aggressive algae growth. Water with high mineral content (hard water) also has a greater buffering capacity and makes pH adjustments difficult.
Chemical filter media such as Poly Filter
removes specific pollutants such as iron and silicate and is a good choice. Peat or similar water softening chemical media can be used to help stabilize pH to desired levels. However, if the mineral content of the source water is very high, avoid using pH decreasers to adjust pH. The minerals in the hard water will buffer the water, making it difficult to successfully lower the pH. A water purification system such as a reverse osmosis
unit provides the most reliable, long-term solution for problems resulting from hard water conditions.