ok but if you are in california on the coast i know for a fact it got hotter then 88 last year and this year will be no different. if it is a reef tank running at 88 bad things will start to happen, im sure you know thats why your wrting. the only way to cool a tank down as much as you need is to run a chiller on it, it is worth the 700 that you will spend and it wont run very often once you get it to the temp you want. you can try fans on the tank but that only helps for a couple degrees. if you have had tanks for over ten years a 700 investment is worth it if you ask me, cheap insurance.
60 ga. SPS tank w/ 2 - 175w 20k halides, korallin 1502 calcium reactor w/ph contorler
24ga. SW nano w/150 HQI
180ga. FW aggresive fish
125ga. FW w/60ga. sump. VERY aggresive fish