This is a great replacement for the Fluval 110 extension tube. Sometimes they break and you have to close the tubes to protect the fish and lower it all the way down so the fish doesn't get sucked in. holes. If you have two of these, the tube will be extended to the gravel, you can even do three of them. I found that such a lamp and Fluval 110 were not enough. The small fish will be sucked into the hole and will die if you don't catch them in time. By lengthening these tubes you can lead them down to the gravel and the fish will be safer. So you connect 2-3 of them together. Just. If one of them breaks below, you can swap out one of the other two as well.
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