Are you getting the 1/2" ones? I found the 1/4" ones to do perfect and they are 9.49+ shipping and taxes if you buy 20+ and only 10.49 if you buy less.
I bought 20 for my 200g display and in 3 months they where everywhere (reproduced) and wiped out my bad aiptasia problem. I probably could have done with less.
Great service from salty underground and the berghia worked far better and faster than I expected.
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