Anyone know about Vegetable Glycerin

[rcpalmer1]

I step up a new water mix / AWC station. I got some tanks from a guy that makes some kind of grapefruit product using Vegetable Glycerin. These were the tanks that the VG was in. It is water solvable. My aquarium is 2+ years. I have had more problems with low nutrients than high. I add the AWC change because I found myself hating to do them because I felt I was changing good water for good water.
It has only been a few weeks but my phosphate has steadily risen. I am wondering if it could be leaching from the storage tank. They are food grade tanks. The coral are doing fine. I noticed one that never has much polyp extension looked better than it ever has, almost furry.

Thanks

 

[DraggingTail]

I step up a new water mix / AWC station. I got some tanks from a guy that makes some kind of grapefruit product using Vegetable Glycerin. These were the tanks that the VG was in. It is water solvable. My aquarium is 2+ years. I have had more problems with low nutrients than high. I add the AWC change because I found myself hating to do them because I felt I was changing good water for good water.
It has only been a few weeks but my phosphate has steadily risen. I am wondering if it could be leaching from the storage tank. They are food grade tanks. The coral are doing fine. I noticed one that never has much polyp extension looked better than it ever has, almost furry.

Thanks

If things look good and you don't have algae issues leave it alone.

If algae starts to be an issue, use a siphon hose into your filter sock and and brush to knock the algae loose. Change the filter sock when you are done.

My coral like high nutrients. They look best when algae is growing. Algae will not grow on a healthy coral.

 

[Mical]

Vegetable Glycerin shouldn't hurt anything. It's actually a good non toxic lubricant for pumps, powerheads etc... Usually phosphates rise from food or RODI exhaustion. I'ld start by testing your RODI TDS

 

[rcpalmer1]

Vegetable Glycerin shouldn't hurt anything. It's actually a good non toxic lubricant for pumps, powerheads etc... Usually phosphates rise from food or RODI exhaustion. I'ld start by testing your RODI TDS

TDS before 3 stages of DI resin is 4-5. Coming out is 0. I have auto feeders dropping TDO pellets. It is the same that I have been feeding for months. The only change I can think of is I have been filling one with small and one with large pellets. I use Hanna phosphorous tester almost every morning.

 

[Randy Holmes-Farley Verified Community Expert]

I doubt there’s any concern about the glycerine. Some may penetrate some types of plastic and slowly be released again, but I doubt it is much.