Well the ice packs are going to work, and I would probably throw in a bunch of ice cubes in the sump. I would not worry about the the tap water ice cubes getting the temp down is the big thing. In a small tank the tap water ice cubes shouldnt be a issue IE like phosphates.
just make sure that you have alot of oxygen in the tank as you know that the colder the water that more O2 is in the water, the hotter is the less I would throw in a air stone too. Good luck man......
keep us informed
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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