The Blue Diamond is made by Watertech, it is owned by the son of Aquabot, my guess is he went on his own to corner more of the market,and to introduce the Poolbuster at the same time, they are not competing against each other .So I do believe the Viva is the exact same machine .I did own a Aquabot plus wireless remote for 4 years, it broke after my kids abused it too much , and thankfully it was purchased from Hammacher Schlemmer and was returned for a complete refund !! (That's called customer service !)The brushes are made of foam, they grip the walls and floor really well, which helps with climbing and the ground speed .I do notice that there are a couple of spots on the brushes that are getting "nicked" a new set of 4 is $115, I called the service center and they said if I bring it down, they'll put them on for $35 , which I though was fair considering the drive belts and pulley design inside.I'm holding off on it this season and hopefully will still get 1 more season out of these brushes , I don't think $150 for new brushes , every 4 years is not reasonable .There are rubber brushes available for the Blue Diamond , but think from trying out the Dolphin and having owned the Aquabot that the rubbber brushes put a lot of wear and tear on the liner by constantly rubbing it when it hits the wall and starts to climb.It DOES clean the pool in an hour , this is due to the Aqua smart system which really covers the pool everywhere , go to the Aquabot website and you'll see a video of the aquasmart sytem's coverage of the pool , this is the reason why the Blue Diamond beats Dolphin, by randomly turning every so often in a totally different direction!!, the Dolphin relies on climbing the wall, creeping along the waterline and HOPEFULLY coming down in a different spot and start cleaning again .The filter bag is a pain to clean, but so is the Dolphin's , I use a bucket of pool water and keep wringing it until it's clean ,You don't need any "tricks or tips' it worked straight out of the box , no floats to play with , really awesome, (and, no I don't work for watertech) I will not make CarlD's "mistake" and tell you this is the correct pool cleaner for you, it's been working great fro me for 2 seasons and this season and hopefully will work in your pool , I have a pear shaped, 30,000 gallon vinyl liner pool , your results might vary.i would only suggets buying from a place that has a trial period, ie. Frontgate, PoolDr, if it don't work ship it back!
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