Here we have an Red sea max c250. In summer, or better when the house temp goes above 21c i'm powering on the cooling fans that come with it. This will help very good. When the temp goes above 26c in house, we have that perhaps a few times a year during summer, i power off the streaming pumps.
When the temp still goes around 29c in the tank I power-off the lighting.
We had a few times in the past 29C in the tank. And didn't notice any issues. Basically it is just a few days. It raise slowly and decrease slowly. One time it was 29.9. Then I opened the hood and placed an fan on the table to blow over the water. Then we need the fan anyway in our living room
A few weeks ago I replaced 4 tl bulbs (out of 6) with led bulbs. That will help to for less warmth.
Some years ago we bought our self an portable air-conditioner. We brougt it back the other day.
Reason It make a lot off noise. Even more as our red sea max
Noise would be ok, if the temperature would go down. But after 12 hour running the room temp increased 1C. We went from 25C to 26C.........
If we get another system ever it will be one that hang on the outside of the house. Every year when the temp goes around 26 in our living room we say, we need to get one... It is just a few days here per year.. So it will never come.