Will my Arrow Crab kill my fish?

I just got an arrow crab today, the guy at the aquarium place told me it would be okay in my 30 gallon tank. After a couple hours I came back to find it munching on my green chromiss. The chromiss looked like it had been sick for a while so I don’t know if the crab attacked it or just found it dead....

Anyone using vinegar in tier Kalkwasser?

I had never heard of this until reading about it in Marine Fish and Reef Magazine. When I googled it, there are plenty of articles. Anyone use this method? Read more from the original source:  Anyone using vinegar in tier...

Nano Cube Straight Pin Compact Fluorescent Bulbs 24W Daylight

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