12-20-2010, 11:20 PM
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I doubt the fry could be raised w/o RO, but you can spawn the parents. I would do this first, like a test spawn, before investing in an RO. It is not an easy task to raise GBR fry. Spawning the parents is the first of many steps. Spawning is actually easier then the raising process. From what I have experience tank breed fish have absolutely no relation to their natural waters. A fish will spawn in the water it is raised in generally. I have spawned them in hard water with elevated nitrates unintentionally. Also just because you have a pair in a tank with perfect water does not mean they will spawn.