Recommend a Generator for CPAP / Fish Tank

I have two questions about recommendations for backup generators (small ones, not whole house ones).

1) For myself, I'd eventually like to get a backup generator for my CPAP (its a Resmed Airsense 11, I believe, I've had it for 3 years). I don't use the humidifier, so my power demands are less. Any recommendations on what to use?

2) Someone on social media I follow has the nor'easter bearing down on them and is worried about the filters in their fish tank, which are dependent on electricity. I immediately thought about the rechargeable generators used for CPAPs would probably have enough power to keep the various things needed to keep a fish tank going for a couple of days during a power outage. I'm waiting to hear back on the size of their tank, but I googled it and small tanks (20g or less) average 65 - 140 watts, medium tanks (25 - 75g) average 140 - 300 watts, and large tanks (75g plus) average 300 - 600 watts per day. Anyone here have any experience with supplying power to fish tanks or have any useful advice on this?

GloveThief wrote: ↑

Sat Feb 21, 2026 12:26 pm

... have any useful advice on [the fish tank]?

Based on the information provided, the fish will be fine with little or no intervention from somewhere between 6 hours and 30 days. The cost for backup power that will ensure complete safety of the piscatorial vermin will be between $0 and $1100.

Really wrote: ↑

Sat Feb 21, 2026 6:59 pm

viewtopic.php?p=606095#p606095

Linking to a 15 year old topic, especually given how much batttery technology has changed, isn't helpful.

@OP, though you mention generators, I'm guessing you mean battery. Two very different things.

I like the Ecoflow Delta 2.

I continuously keep my CPAP plugged in, should there be a power disruption, it automatically switches over. No nighttime interruptions.

It's a mistake to double duty your battery backup, especially for non-essential use. The potential reduction in capacity for non-essential items, could mean the difference between sleeping through the night with battery, or not.

Linking to a 15 year old topic, isn't helpful.

Consider allowing the OP to determine what is helpful for themselves.

Thanks for the ecoflow delta 2 recommendation, l like the auto switch over set up, so i will look into those.

I'm still using a 55ah deep cycle marine battery and hardwired the dc adapter to an extension cable because the cigerette lighter connection wasnt stable. And of course a transformer on the corner just blew and it looks like a house nearby got a little burnt. I'll turn off the heated tube and humidifier to reduce power consumption.