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Hi all, This is my third sea hare in five years or so and, like the rest, he's now showing a small hole on his back after a week or two in my 250-gal reef. At present, the hole is similar in size and shape to his rectal opening - very prominent on a sea hare - and hasn't grown much in the last...

Hi all, I recently swapped out my Iwaki MD-100RLT with a brand new, identical unit, only to find that the replacement is comparatively noisy! Its predecessor was virtually silent. Closer inspection reveals that the pump isn't producing noise per se, but is generating a strong vibration which...