I have a 10 gallon cube tank, with 3 gourami's and a moss ball.
Welcome to Fishlore
Not sure if the title has a typo in it? What's "aucclear"?
Also, what kind of gouramis do you have?
Even if it is DG or honey gouramis I would say that that tank is a bit over stocked if they are a big species of gourami :'(
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