Re: vacuum
you can use just the hose and get what you can..... If they are planted tanks you don't need to worry so much...... you can also Vaccume in a a four section pattern. Divid the tank into 4 sections and only vac one section at each water change, in 4 weeks you will have vac the whole tank...... Depending on how deep the tanks are they do sell a battery power vac, I never used them but you looking for ideals
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