I don't recommend it for your expensive fish. My Sevron is king in my 75 gallon tank, but when it seeks privacy it needs a safe spot. It's growing out of its current lair and I thought it would make a nice transition to a larger lair. However, I found it too hard and didn't want him to get hurt. I tried sanding based on other recommendations but that just chipped and deteriorated the finish. I liked the look and would probably recommend it for smaller fish but it didn't work for me.
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