What do you need to grow- this should help everyone

cjsbabygirl313 said:

Careful - shop vac might be over kill ... check ‘em out online before you go buy one. I think they come in various siizes.

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I use this tiny little shopvac. I thinks it's meant for cars or something but it's plenty. In hydro I don't often find myself sucking up water. Also I do t care if there is 3 gallons left in the rdwc after water change. U less I got some slime in which case it's already all fugged up