Dolphin S400 vs M600 vs Sigma

Annoulini

Member
Jun 22, 2021
24
Tomball, TX
Pool Size
13000
Surface
Plaster
Chlorine
Salt Water Generator
Any feedback on these pool cleaners? I was set on getting the M600 from Marina Pool and Spa but its not in stock and they are having delays with getting it in.

They do have the S400 but I dont see any reviews on this one. Must be new? I just want to make sure it makes it up to the waterline, doesn't fall back.

The Dolphin Sigma is the other one I am looking at just more $$$ not going through Marina.

Any feedback on these would be super helpful!
 

Mdragger88

Bronze Supporter
TFP Guide
Jun 1, 2018
7,694
Hernando, Ms
Pool Size
26000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Intex Krystal Clear
The s400 is a premium bot & should have no trouble accomplishing waterline cleaning as listed in its specs since it has power stream . Here’s the specs - scroll to the bottom of the page👇
& for the sigma to compare features 👇
 
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Annoulini

Member
Jun 22, 2021
24
Tomball, TX
Pool Size
13000
Surface
Plaster
Chlorine
Salt Water Generator
The s400 is a premium bot & should have no trouble accomplishing waterline cleaning as listed in its specs since it has power stream . Here’s the specs - scroll to the bottom of the page👇
& for the sigma to compare features 👇
Thank you
 

ArsenalFan

Silver Supporter
Jan 29, 2021
53
Brea, CA
Pool Size
18250
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool Core-55
Have had my Sigma for a bit over a year, Love it. Does not get stuck on my drain cleans all but the top step of three. Does a great job cleaning the walls and tile plus my 5-foot bench and the tile behind that? Plus keeps one of my dogs busy chasing the monster. I keep it in the pool 24/7 except when adding chemicals. I came from a Polaris 380 & 360 and the Sigma filters picks up the fine sand and dirt that gets in the pool.
 

the_sphynx

Well-known member
Feb 19, 2019
108
North San Diego County
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I had my old M400 go out last year and bought a new S400 about 3 months ago. 99% love it. It's much lighter than my old M400 for sure. It seems to climb better as well.
The one downside I have is that the front is fairly light so it seems to do a lot of wheelies at the bottom of the pool. I am not sure it makes a difference with the cleaning since my pool is still nice and clean but sometimes when I toss it in and it sinks, it just stands on it's back part of the treads.
Other than that, it's much easier to clean than my old one too. I have no regrets. The wifi on the S400 seems to work fine with my wifi. I know some people said it's was flaky but mine seems fairly stable.
 
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stinsontx

Gold Supporter
Jan 31, 2022
58
Houston
Pool Size
19000
Surface
Plaster
Chlorine
Liquid Chlorine
Good to hear about the S400, I purchased one last week and will be putting it in the pool today for the first time. I'll report back on my experiences as well!
 
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