Step away from the Whisper...
Apologies but these are almost legendary for fact of blowing diaphragms within 6-12 months out of the box. I have two Whisper 100s (and a 60) that I'll give you (against my better judgment) for free that needed replacement diaphragms after less than a year of use. As replacement kits are around $15 online with shipping (Tetra won't sell just the diaphragms but rather forces one to buy the entire "arm"), that's more than half the cost of a new unit.
I like my fish and travel a lot. Whether I leave the house for 10 days or just turn out the lights to sleep, I like to imagine that my filters, as well as my heaters and lights will continue to function and keep everyone alive in my absence. Just as people that lose fish when a heater fails tend to invest in better heaters, so it is with air pumps/filters once the failure of crap hardware causes a tank crash or low oxygen levels to smite all/some of the inhabitants.
I found Whispers to be misnamed as well and in a word, noisy. That led me to try Dolphins (very quiet but weak), Renas (fairly quiet but not much air flow for the price) and AirPods (relatively quiet and good air delivery). An Alita is in truth probably overkill for what you need at present, but strongly urge you to avoid Whispers unless you've got a thing for debilitating/dysfunctional relationships. Of others also have junked Whispers we should co-join them in single box and I'll pay to ship them back to Tetra along with a nice cover letter extolling the lack of virtue in this particular aspect of their larger product line and its effect on the consumer habits of fish fanatics world over.
