glutaraldehyde instead of excel - Page 3 - South Western Ohio Aquatic Plant Enthusiasts

allen · 10-01-2006, 06:11 PM

Quote:

Originally Posted by MatPat

Assuming Epicfish's calculations are correct I think it is funny that the Riccia in the 10g had issues while the riccia in the larger tank did not. Do you think this may be because the gluteraldehyde was diluted more in the large tank due to the tank's height? Did yo add the gluteraldehyde directly over the Riccia in the 10g?

I added the glutaraldehyde into the flow from the filter and the riccia was on the other end of the tank.It may be the level was to high.I'll move some riccia back into this tank and see.

MatPat · 10-04-2006, 08:20 AM

Did you move any Riccia back into the tank yet? If so, how is it doing?

allen · 10-04-2006, 09:12 AM

All the riccia is dead in the 60g also.It took longer,must be the lower dose.

MatPat · 10-04-2006, 09:47 AM

I guess you have found that Riccia doesn't like gluteraldehyde. I don't think I have ever overdosed a tank with Excel to see if it has the same effect on the Riccia. Looks like you may need to experiemtn with some Excel in the tanks for a few days

Gluteraldehyde may be a good idea for those looking to eradicate Riccia from their tanks assuming it does no harm to any of the other plants in your tank!

dennis · 10-04-2006, 12:26 PM

Is this the kind you are using? I can only seem to find gluteraldehyde solutions that say 28 day or 14 day formula. I wonder if that refers to the shelf life or to the reuseability. Many of the descriptions from different suppliers say reusable for the number of days. I just want to make sure I am not getting the wrong stuff.

I have also seen some listed as "activated". Does that make any difference?

Allan, what brand do you have? You can even PM me if you want.

dennis · 10-04-2006, 01:06 PM

I am slowly answering my own questions...

Cidex activated Dialdehyde solution info can be found here:
http://www.safety.vanderbilt.edu/pdf...ch=%22Cidex%22

From what I can tell, the activated means it has a higher pH, probably for better microbe killing. I don't know. The shelf life appears to be "chemically stable" under proper storage, ie 59-86degrees F. This product contains 97.45% water and 2.55% gluteraldehyde by weight.

I wonder if it makes a difference to our purposes if it is activated or if the day use applies to use or to re-using it stuff in a medical setting?

Now to see about pricing/shipping.

allen · 10-04-2006, 08:59 PM

Matt,do you have any riccia i could have to try with the excel.All of mine is wiped out.

Dennis,that is not the same brand but the discription is the same(28 day glutaraldehyde,activated diadehyde).I beleive the 28 or 14 day formula refers to how long the solution is good for after you mix in the activator that comes with it.That is for sterilization of medical equipment.What I did was not add the activator and dose the glutaraldehyde straight from the gallon jug.

MatPat · 10-05-2006, 05:41 AM

I think I have some mini Riccia still, I will check and let you know later on. Do you want me to mail it to you or wait until the Auction?

epicfish · 10-05-2006, 06:59 AM

Glutaraldehyde - The Highest Purity

25% solution
0-18ºC 16220 Box 10x10ml ampoules 21.00

You can do a 1:9 dilution (10 mL glutaraldehyde to 90 mL of water) to give you 100 mL of 2.5% solution per ampule. That's 1 liter of glutaraldehyde for $21 + shipping. Although some other places might sell bulk for less (not sure, haven't checked) this type of packaged glutaraldehyde is preferable since each ampule is packed in inert nitrogen so there's no breakdown or adverse reactions since it's not exposed to air/oxygen. You can mix up 100 mL batches and dose them as needed so you won't waste much of it.

Heck, if you have larger tanks...
0-18ºC 16521 50% Solution 4x1 liter 67.00

1 liter solution to 19 liters of water will give 20 liters of a 2.5% solution. This is 4x1liters of glutaraldehyde, so you'll get 80 liters. For $67 + shipping. Less than a buck per gallon!

I'm not sure why the riccia is dying. Are you dosing straight into the tank? I suspect that if the entire bunch of riccia is being hit with too concentrated a solution of glutaraldehyde, the fine plantlets won't be able to recover & will die slowly. Try to add the glutaraldehyde in a very diluted form.

Allen, you said the riccia died slower in the 60 gallon tank. I think it's because as you added the glutaraldehyde, it was more easily diluted in the 60 gallons before it hit the riccia as opposed to the 10 gallon tank.

Maybe when you do a WC next time, add the dosage into a bucket of water instead of dosing straight into the tank. Or you can try adding a bit at a time, throughout the entire length of the tank and avoiding the patches of riccia?

I'm looking forward to the remainder if your experiments!

epicfish · 10-05-2006, 07:03 AM

Google cache. I can't find the original thread. Or rather, haven't looked for it.

PlantedFanatics.com :: View topic - Effects of Seachem Flourish Excel on BBA

Conclusion

The effects of Seachem Flourish Excel on BBA were documented with images and texts. It shows that Seachem Flourish Excel caused the BBA to turned red within 24 hours. The BBA gradually turned white over 120 Hours and disintegrate slowly thereafter.The experiment shows that Seachem Flourish Excel has successfully eliminated BBA. We would advise that Seachem Flourish Excel should not be use as a permanent way of removing BBA, as solving the root of the problem is the key to prevent future outbreak. We realised that Flourish Excel should not be used in large amount on mosses, riccia, and fissidens. It may cause them to turn brown or even kill them.

So MatPat, high doses of Excel *will* kill riccia. =)