This thread got me curious. Also since I will be setting up a 75g tank soon, I wanted to know about my local water.
Q: What is Chloramine?
A: Chloramine is formed when ammonia is added to water that contains free chlorine. Depending upon the pH and the amount of ammonia, ammonia reacts to form one of three chloramine compounds. NH2Cl, monochloramine, is the preferred compound and is the one Washington Aqueduct will produce.
Q: Is chloramine safe and are there any negative effects to the changeover?
A: Yes. Chloramine is safe. EPA accepts chloramine as a disinfectant and recognizes its ability to control THM formation. Chloraminated water is safe for bathing, drinking, cooking and all everyday uses. For the majority of the consumers there will be no negative effects as a result of the change. However, there are two groups of people who need to take special care with chloraminated water: kidney dialysis patients and fish owners.
Q: What about fish tank owners?
A: Fish tank owners, including hobbyists, restaurants and fish markets, who now treat for chlorines in the water, should assure that they have appropriate carbon filtration equipment or use water treatment products that neutralize chloramine. These products are readily available through pet and aquarium stores, as well as from companies that service commercial fish tanks
Q: Are Koi fish affected by chloramine like other fish?
A: Yes. Koi are just as susceptible to being harmed by chloramine as any other fish.
Q: Are salt water fish affected by chloramine?
Q: Does letting water sit for a few days remove chloramine from tanks for pond water?
A: No. Unlike chlorine, which breaks up when water sits for a few days, chloramine may take weeks to disappear. If you choose not to use de-chloraminating chemical, install a granular activated carbon filter and allow sufficient contact time between the water and filter.
Also click here
for what they recommend to remove chloramine.
For my interests, basically umm they say to... add Sodium thiosulfate but then ammonia is released.
So I am left with how to deal with that.
I will do more searching, I am sure it is adressed somewhere here, however if anyone who has more experience and knowledge point that out for me.. that would be great.
EDIT: and that answer is here
Basically use Seachem Prime
when filling your tank/dechloring to also remove/negate ammonia.