Adding photo of it in the actual aqaurium. I do have a bit of trouble with some larger fish tossing around gravel, so I have had to empty it out and put it back in once already because one of the entrances got blocked and was a bit worried a fish would be inside and get stuck if other side got blocked too haha. I put the lips of the tunnel a bit higher so gravel less likely to fall inside so will see how it goes, but already have seen several fish use it, especially my albino plecos.
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