Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (
-   Beginner Planted Aquarium (
-   -   Glutarldehyde instead of Excel? (

Fishnerd101 03-29-2013 06:08 PM

Glutarldehyde instead of Excel?
I've read on a bunch of websites that people use glutaraldehyde instead of excel as a carbon source for plants since glutaraldehyde is what makes up excel. It's alot cheaper that excel, but I'm not sure it's safe. It might not be the same concenration as excel. Does anybody have any experience with it?

Byron 03-29-2013 06:26 PM

You would have to dilute the glutaraldehyde with water, comparable to what products like Seachem's Excel or API's CO2 Booster do. The only ingredients in both are glutaraldehyde and water; Seachem term the chemical polycycloglutaracetal but this appears to be their form of glutaraldehyde.

The problem though is the glutaraldehyde. This is a very toxic chemical that is used in hospitals to sterilize medical instruments, in anti-freeze, in embalming fluid (it kills bacteria), in ship ballasts to kill bacteria, etc. It is dangerous to humans if it gets on your skim, or the fumes are inhaled, as this data sheet indicates:

Some plants will be killed if Excel or CO2 Booster are used even at recommended strengths. If it is overdosed, plants, bacteria and fish can be seriously affected and even killed.

The manufacturers of both products may say they are safe with fish, but any chemical substance that carries such hazards is not something I care to use.


MoneyMitch 03-29-2013 06:43 PM

byron is right, but there are many note worthy aquarists that do use glutaraldehyde with water with no adverse effects, some even use double or triple doses. i personally dont use and will not use such a product just giving some insight is all.i feel that a x4-x7 growth rtate increase just isnt worth it not to mention it would also come along with having to find a new light/fert balance.

Fishnerd101 03-29-2013 06:59 PM

Thanks for the quick replies. I personally don't want to mess with it either if it's that dangerous. I'd rather work with excel, since it sounds (relatively) safe. I'll just use it until I can get a co2 system. Just another thing on my never-ending wish list...

jentralala 03-29-2013 07:21 PM

Many tanks do just fine without those additives, even Excel carries a lot of risks as Byron stated. The majority of plants get on just fine with just Flourish Comp, and that poses no danger to fish like Excel does.

Even CO2 can kill fish if overdosed or if it runs at night.

I wanted CO2 as well when I first started my planted tank but I've found mine does just fine without it, honestly.

ao 03-29-2013 08:41 PM

I use undiluted metricide 14 at double the dose in a 1 gallon~ doesn't affect anything in my tanks, even the shrimps. But then again I'm not really sure if there is a long term adverse effect. I mean if a human were in a place with high radiation levels for a day they'd be completely fine, but if they lived there, the effects may not be felt for another 40 years anyway or something... just an analogy.

Every inch of my tank is covered by plants (top middle bottom), so I'd like to think that the plants use the metrcide faster than it can harm the live stock. I mean the ferts we dump in our tank aren't really that great for fish health either but the plants absorb it fast enough so there is no build up. That's also the reason why I always dose ferts and metricide first thing in the morning~

I think you should dose according to how heavily planted your tank is. Ask people with similar plant stocking about their dosage and what works for them ^___^

Fishnerd101 03-29-2013 09:34 PM

Yeah, I'm definatley going to need some kind of co2. I just got a double tube t5ho fixture online. I'm about to take the plunge into high-light plants! (Holds breath) :lol: I know it's gonna be algae city without a good balance, so I've got to wait until I find a good solution. I'll use excel until I can get pressurized co2. I might get some metrocide to experiment with in a little fishless bowl I have in my window to see if it actually helps.

MoneyMitch 03-29-2013 09:37 PM

just because you have high lights doesnt mean you need co2, i have a whole writeup on this under the plant section :algae fight method" a tank with a fishload will have plenty of avilable carbon soruces and not need a outside source

heres the link to it

Fishnerd101 03-29-2013 10:15 PM

That's really cool. It'd be great to not have to spend even more money if it's not necessary. My fish loads at the max, so they're probably cranking out enough co2.

MoneyMitch 03-29-2013 10:24 PM

the fish dont actually crank out co2 its the breakdown of their waste that creates the co2. along with the source of ammonia that is converted to ammonium

All times are GMT -5. The time now is 09:11 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

For the best viewing experience please update your browser to Google Chrome