hi jw, quite impossible to push the temp down to 26 degree, I use one AC for my 4ft and the lowest I can achieve is 27degree, even with 2 AC fan, oso ard that temp.. but I find that adding another fan dun really makes a all lotsa diff. except for topping up of water lost
u can find AC fan at sim lim tower, price range between 15-30 depending on brand, rpm... u oso have to make sure to secure the fan, in case it drops into your tank and "Boom" trip yr circuit breaker
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