Newbie sump question

[sarrachs]

Hey all
New to hobby. Saw some things about certain heaters not recommended for acrylic tanks. I plan on putting my heater/heaters in sump. I have a trigger acrylic sump and wondering if there is a recommendation for what is ok not ok for this setup. Would hate to have bowing or other issues

 

[shakacuz]

usually the heaters come with a silicone suction cup or acrylic magnet holder (bought separately), this should be enough to not burn or warp the acrylic.