Tunze vs Hydor

[bv_reefer]

no idea about the controllable series, but i have the non-controllable koralias and am very satisfied, easy to take aprt and clean, gives strong even flow, and IMO are worth every penny. don't know much about the nanostrems but have heard that there clips break alot of times. i also really like how strong the magnets are on the koralias. if you're looking for a larger, controllable unit, hydor now has all 5 models with matching controllers available, at a much more decent price..