Ahhhh...ok. So, you plan to leave that rock in the system or you're just using it to cycle? If you're leaving the rock in there and the rock is fully cured then you can add the fish right away. If you're removing the rock then you need something like bioballs in the sump to host the nitrifying bacteria in which case you need about 2 weeks for the rock to seed the bioballs.
Either way, if you're going to have a breeding system you need to get used to using an ammonia detoxifier, and you should have it on hand at all times.
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~ Mindy
SPS fanatic.
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