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Bass Boat Oxygenator Opinions
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Posted by churly
5/27/2020 4:39 PM
Tony. I work 60 hours a week so I will try to gather a bit of data as the summer moves on. I will say its gonna be hard to find a livewell at a bass tournament that doesnt have rejuvenade or release aid added to it.

For pretty cheap You can add the O2 injection system and not worry about rejuvenade, ice, dead batteries, and all the other crap. the only other thing I use to protect my fish are flip clips for the deep caught ones. I feel these are a must for deep caught bass in the summer.
Posted by Tony M
6/2/2020 7:10 AM
Churley - The cheapest commercial made store bought oxygen-injection systems I’ve seen on the net ranges from $126 to $199 and change. Anyone can build a very cheap homemade DIY system shopping used components < $50 (used O2 tanks, used regulators and cheap bubblers).

The Rejuvenade may kill your DO testing research at bass tournaments since it is often provided free to fishermen promotionally. I know no tournament bass fisherman that would ever turn down any free bass safer chemicals at tournaments. Oh well, you seem to be a pretty bright guy and scientifically motivated, maybe you can figure something out this summer. There’s o telling what chemical is in the Rejuvenate witches brew that causes the DO meter to fail… secret stuff. It definitely lights up the catch over stimulating all the fish. Add a little extra Rejuvenade to the livewell water before the weigh-in and really supercharge those bass before weigh-in. The irritant makes the fish extremely hyperactive.

The Oxygenators generates chlorine gas if the livewell chemical contains electrolytes (sodium, salt). There is a simple test that any fisherman can do to determine if any bass saver livewell chemicals contain sodium salt electrolytes and the test is quick and free… just taste a little dab of it out of the bottle and see if it taste salty.
The U2 livewell chemical advertised and promoted by T-H Marine that makes Oxygenators too claims their U2 bass saver chemical (G-Juice) does contain electrolytes and electrolytes are great for stressed tournament caught bass. They advertise that their U2 Formula is the only bass safer livewell chemical that will not generate chlorine gas when used in conjunction with their Oxygenator. The probably make much more money selling their U2 Formulas that selling Oxygenators. The U2 bass saver sales goes on and on whereas their Oxygenator sale is a 1 time sale, the Oxygenator is the hook to buy more jars of U2 Formula over and over for years.

It's all about the magic of marketing...
Posted by silvertalon
6/2/2020 9:53 AM
Ice is essential when the water gets over low 80's (IMO). What ice? Do not use bagged ice unless it is a little at a time or unless you put it in zip lock bags. Chlorine is the issue. I fill gatorade bottles and freeze them. Fill your cooler with them and every hour drop one in the livewell while keeping the recirc pump on full time. It will lower the water temp about 5-10 degree's. Also, 5-10 degree's lower is the magic number. Too much ice can shock or kill the fish when they are exposed to very warm water afterwards. This is why too much ice in a tournament release tank is a very bad idea. Potable air bubbler's are the cheapest way to go if you can't afford a fancy o2 system. I use them in my weigh-in cooler on wheels and this cooler is my primary livewell in my 16' boat. I've never lost a fish using o2 bubblers and a frozen bottle of water. Then comes the gas's- checking fish frequently will eliminate most of the toxic gas's above the water line however lid vents are a good idea so that the toxicity will not build up in the water. Single livewell's with a divider have been in IMO, the best system. I can't ever remember ever loosing a fish in my Champion livewell in over 20 years. 1 fill pump on a timer or constant on. Ranger uses a patented pump manifold system- when it is set on auto the full time recirc pump also draws fresh lake water from the intake side of the fill pump mixing it with recirc water, allowing for only 1 pump running. Separate dual livewells need 4 pumps to operate both of them at once creating battery issues if you are not using a giant agm. Or, when in the excitement of boating some nice fish you have found later that you flipped on the wrong pumps when you find a 5lbr floating belly up.
Posted by Tony M
6/2/2020 2:39 PM
Good points Silvertalon,

A little trivia about DO Concentration and DO Saturation right from the DO Chart; is chilling water 10 F with ice really necessary when the water already contains 8 PPM DO before you ice it down?
It take a lot of ice hauled in a bass boat all day to maintain chilled liewell water continuously 10 F for 7-8 hours in June and for all the rest of the summer tournaments 2020.
With no bass in the livewell consuming DO, at sea level, fresh lake water is 100 % DO Saturated @ 8.1 PPM DO Concentration @ 70 F.
With no fish in the livewell consuming DO, at sea level, fresh lake water is 100% DO Saturated @ 8.8 PPM DO Concentration @ 80 F.

All the work, cost and effort to chill 80 F lake/livewell water 10 F down to 70 F increases the CO Concentration only 0.7 PPM

The EPA safe DO water quality standard for freshwater lakes is 5 PPM DO concentration that is considered great, safe water DO quality for bass.

Question for you: If there is already plenty of dissolved oxygen (>8.0 PPM DO) in 80 F lake water/livewell water what do you believe is the real point of chilling lake 80 F water to 70 F when that lake water in your livewell is already 100% DO Saturated with > 8 PPM DO?

Ice may be no more than just an old, old ingrained habit. An auto response that has been read and practiced faithfully by bass fishermen and live bait fishermen for decades in the summer?

I don’t really see any low oxygen problems with 8 PPM DO for a regular limit of tournament bass in the box. Do any of you see any problem with this much natural DO in 80 F livewell water?

I have also heard biologist say at fishing shows that that IF you do not/never overcrowd your livewell with bass and run your aerator continuously and livewell water pumps, and there will be plenty DO in warm kivewell water,
Posted by drdetroit
6/2/2020 6:07 PM

Very interesting!!!

Dr Detroit  

Posted by silvertalon
6/2/2020 10:02 PM
Tony M - 6/2/2020 3:39 PM

Good points Silvertalon,

A little trivia about DO Concentration and DO Saturation right from the DO Chart; is chilling water 10 F with ice really necessary when the water already contains 8 PPM DO before you ice it down?
It take a lot of ice hauled in a bass boat all day to maintain chilled liewell water continuously 10 F for 7-8 hours in June and for all the rest of the summer tournaments 2020.
With no bass in the livewell consuming DO, at sea level, fresh lake water is 100 % DO Saturated @ 8.1 PPM DO Concentration @ 70 F.
With no fish in the livewell consuming DO, at sea level, fresh lake water is 100% DO Saturated @ 8.8 PPM DO Concentration @ 80 F.

All the work, cost and effort to chill 80 F lake/livewell water 10 F down to 70 F increases the CO Concentration only 0.7 PPM

The EPA safe DO water quality standard for freshwater lakes is 5 PPM DO concentration that is considered great, safe water DO quality for bass.

Question for you: If there is already plenty of dissolved oxygen (>8.0 PPM DO) in 80 F lake water/livewell water what do you believe is the real point of chilling lake 80 F water to 70 F when that lake water in your livewell is already 100% DO Saturated with > 8 PPM DO?

Ice may be no more than just an old, old ingrained habit. An auto response that has been read and practiced faithfully by bass fishermen and live bait fishermen for decades in the summer?

I don’t really see any low oxygen problems with 8 PPM DO for a regular limit of tournament bass in the box. Do any of you see any problem with this much natural DO in 80 F livewell water?

I have also heard biologist say at fishing shows that that IF you do not/never overcrowd your livewell with bass and run your aerator continuously and livewell water pumps, and there will be plenty DO in warm kivewell water,


Great trivia and tech stats on D.O. Something every bass angler should know. The point here is , bass are cold blooded and the cooler the water, the lower their motabolism meaning they require less o2. Release rates at tournaments easily show little to no mortality when the water is below 80F. Go to a CBA or big tx event in july or august and hang out near the release tanks. You will see a lot of fish struggling to survive or become rejuvinated. So lets assume we all have in- dash DO meters to monitor our livewell water. What does a guy do when pumps are running and a low 02 alarm goes off? Add ice I guess, lol. I think the big bene to additives like G Juice is for slime coat restoration and it is supposed to calm your catch. Maybe more hype. It's cheap and easy for me to refreeze my sports drink bottles and load them back into the boat. I use them for cooling my food and drinks anyway and it only takes a whopping 5 seconds to drop one in the well every hour. I don't measure the water temp . I know by feel that it is for sure cooler than the lake surface temp when I compare the two. Another consideration is - closed livewell lids with dark carpet get downright hot in the summer and transfer a lot of heat to the 02 layer above the water line heating the well water even more. Tip here is to run the fill and recirc pumps full time. (according to KVD , lol). You've inspired me to pick up a floating thermometer!
Posted by Tony M
6/3/2020 3:23 PM
For most tournament bass fishermen I know, the whole point of the tournament exercise is winning the $$ and if 1 fish dies in your livewell for any reason and you are punished for turning in 1 dead bass at weigh-in, all that work, preparation and tournament cost is all wasted.

But, why isn’t 100% DO Saturation with > than 8.0 PPM DO Concentration plenty of dissolved oxygen in any livewell water?
This DO concentration exceeds the minimal DO Concentration established by the US Environmental Protection Agency as healthy, “safe” DO level (5 PPM DO Concentration @ 100% DO Saturation) for fish by 3 PPM DO Concentration.

The minimal safe EPA Standard of 5 PPM DO is exceeded by an additional 3.0 PPM DO in excess of the safe DO oxygen concentration for the natural environmental DO Saturation @ 80 F (> 8.0 PPM DO).

What’s the point of chilling that livewell water with ice 10 F to increase the DO only 0.7 PPM increasing the DO up to > than 8.7 PPM?

Seems me that the 8.0 PPM DO concentration is plenty of oxygen in livewell when the “safe” EPA requirement for DO Concentration is only 5 PPM DO. 100 % DO Saturation.
Could there be a fishery biologist watching this thread and would join in, share opinion tell us why the 8.7 PPM DO is necessary because 8.0 PPM DO is not enough DO in livewell water and requiring intervention with ice, hypothermia and potential temperature shock for the additional 0.7 PPM DO going from cold livewell water to warmer holding tank water at the weigh-in and warmer live release boat hauling tank water.
Posted by Tony M
6/26/2020 7:25 AM
Hello Churley – Summer began last Saturday June 20, 2020. We’re a week into summer now and lake water is getting hotter every day.

Have you done any DO testing in any bass boat livewells yet?
It will be interesting to see your DO Test results in livewell containing fish… be sure you get the DO % Saturation test results when your testing with live fish in these livewell.

Testing DO livewell water with no fish in the livewell is totally meaningless… that’s like testing DO in a glass of water.
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