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corals not doing well

  1. General Reef Discussion
    hi all some corals in my tanks arnt doing very well. i have 4 t5 lights 2 blue 2 white plenty of water cerculation 2 fx 5 filters all water params fine but corals not doing well tanks abut 8 months old fish doing well crabs , lobsters , snails shrimps all fine . if anyone can help me in any way...
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