AFAIK, a quality carbon block filter is all you need. Nothing special for chloramines. I have chloramines in my water and have been using "regular" carbon blocks since I started in the hobby, two years ago. Still using the original membranes that show no sign of needing to be replaced.
Righto.
We conducted a test with Randy Holmes Farley back in the day. We bought chloramine test kits. Our result was the carbon removed chloramines.
Edit: the link above is to Randy's article about the testing we did that I mentioned. His "Lessons Learned..." items are worth posting:
[quote="Randy Holmes-Farley']Lessons Learned and Suggestions:
1. Most RO/DI systems seem capable of removing chloramine adequately for aquarists.
2. The carbon cartridge may become less useful over time, and it is possible that the chloramine removal effectiveness of a system may be lost before the DI appears to need changing.
3. Cheap sediment cartridges may expose the carbon cartridge to unnecessary fouling, which may permit chloramine to pass through the system. Cartridges should be replaced as soon as the pressure drops significantly, even if RO/DI water is still being produced at a reasonable rate or purity as measured by total dissolved solids.
4. Testing for chlorine and chloramine is easy, so any concern is easily reconciled.
5. One Hach kit provides several dozen test results. Our local Boston Club bought some kits and had a "water testing day." The kits can also become part of the "library" of a local club for aquarists to use once in a while to see if their systems are functioning. That way, the cost to each aquarist is minimal.[/quote]