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nfrank · 04-09-2009, 02:37 PM

I just bought a gallon of Metricide 28 on ebay for $17.50 shipped. Clearly, an impulse purchase. Not sure what i will use it for ....since i already use pressurized CO2 and dont have much visible algae. Guess i can experiment and can always share with friends.

Now that i bought it, i need to find out what i purchased , and if i got the right stuff

I already figured from reading this thred that i wont use the NaNO3 activator which also includes a rust inhibitor. I guess that the surfactant (wetting agent) is going to be a very small amount and at the concentrations that we use, it can be ignored, right?

What is the significance of the "28?" Is this the shelf life of the open bottle of disinfectant with the activator... before it polymerizes?(i.e. changes its organic carbon structure). I am guessing that the potency as algicide can change after that time although it can still be effective as source of carbon.

What do you folks think about Metricide 28 and what are your recommendations for its use?

Thanks.

04-09-2009, 02:37 PM	#151 (permalink)
nfrank Senior Member Join Date: Jan 2005 Location: NC Posts: 183 iTrader Ratings: 17 iTrader Positive Rating: 100% Plant Points: 25700	Re: glutaraldehyde instead of excel I just bought a gallon of Metricide 28 on ebay for $17.50 shipped. Clearly, an impulse purchase. Not sure what i will use it for ....since i already use pressurized CO2 and dont have much visible algae. Guess i can experiment and can always share with friends. Now that i bought it, i need to find out what i purchased , and if i got the right stuff I already figured from reading this thred that i wont use the NaNO3 activator which also includes a rust inhibitor. I guess that the surfactant (wetting agent) is going to be a very small amount and at the concentrations that we use, it can be ignored, right? What is the significance of the "28?" Is this the shelf life of the open bottle of disinfectant with the activator... before it polymerizes?(i.e. changes its organic carbon structure). I am guessing that the potency as algicide can change after that time although it can still be effective as source of carbon. What do you folks think about Metricide 28 and what are your recommendations for its use? Thanks.