Best size water chiller?

So I’m looking to get a water chiller, has anyone have first hand experience with active Agua 1/10 hp or 1/4 hp units I’m looking into chilling 30 to 50 gallons if I do get the 1/10 of a horsepower unit I’ll gladly reduce my reservoir size to 30 gallons I’m just not sure how viable that is at keeping my nutrient as low as 64f-66f….am I at room temp is 78-85f regardless of time of year in that room.

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I bought the 1/4 horse as it was around $10 more.

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Active aqua? What size Rez?

My rez was 30 gallons along with working solution adding another 25 or so. The 1/10th will do the job for you more than likely up to say 80 gallon rez. Unless you are suffering from excess heat or are nuking your plants.

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My room temp is 80-85f