Re: Identification
robin adair said:
I was also impressed with the clarity of the photos. I was also impressed by Tom's ability to identify the algae. How did he learn how to do that??
It made me think how good it would be if there was a Barr Report devoted to the classification and identification of the more common tropical freshwater algae. What families they occur in, what the diagnostic features are etc and perhaps what water parameters bring on outbreaks. It would be a handy report for those that want to look a bit more closely at the most undesirable of all aquarium plants......before they get rid of them.
Robin
Robin, each month I get closer to doing such articles.
Algae have long been used in environmental assessment, The EPA has various algae used as standards for various pollution ratings.
Algae tend to be much wider spread in aquatic systems, more sensitive to various changes, short lived, making them ideal for bioindicators.
I've monkeyed with parameters in our tanks for many years.
There are a few other potential issues, these tend to be very minor in our context, but the main issues for various algae species are pretty clearly defined.
Like plants, algae grow and bloom for clearly definable reasons.
Being able to induce algae specifically is a very good way to see what
causes algae.
This is a far superior method than folks that see algae, then try and test 20 things to see what correlation might be there.
Correlation does not equal causation.
Example:: So and so says high PO4 = algae.
There is a correlation with high PO4 and algae because the plants are not growing and not taking up the PO4. Say the algae is BBA.
Many have long said this myth, and unfortunately even 10 years later, folks still keep saying this, we know it's CO2.
We add good CO2 and other nutrients, then we add lots of PO4 and wait and see.
No algae, BBA.........well then that hypothesis that algae is caused by high PO4 cannot possibly be true, rather, that was just a correlation.
So what is truly causing the algae?
You go down and try and rule out other potential issues this way.
It's easy to see if PO4/Fe/light etc causes something like algae.
Many make such claims on line and in books/mags etc.
All you have to do is make sure everything else is in good shape, then add/delete what it is they claim is causing it.
Do this a few times or use several tanks. Ask others to do it and see.
Then you will know.
Someone claimed high K+ caused Ca++ blocking and thus their poor growth.
I have low Ca++ and high K+, I know that cannot possibly be right, but......... "Tom Barr must be wrong, clueless, negative, does not know everything, because when I add K+ I have stunting."
Then I explain it, they still do not get it, then I offer other folks that have very high K+ with the same species of of plants they have and I try it out yet again, and then suggest the folks that have been dosing forn over 10 years never had an issue, I still get poo pooed.
Ho hum. Personal attacks rather than debates.
Folks just do not get this part sometimes.
Some do but it takes them a long time to come around.
The other issue is someone will to induce algae to an otherwise stable healthy well growing tank. Most folks have tried to analyze their algae issues from a messed up tank prespective.
This is terrible way to do it.
It';s much easier to see what causes algae by adding/deleting something to a healthy system.
But....the hobbyists are too chicken to do this once they get there to a good healthy tank.
Those that do not yet have the tank in the shape they want, have many issues controlling their parameters anyway, who knows what all they are doing wrong.
That is much more difficult.
Algae have clearly defined conditions to bloom, unlike test kits, the algae do not need to be calibrated and are a quick rapid assessment. The algae does not lie about what is happening.
Test ktis and many multiple issues with someone who already has issues with algae and controlling things is a far worse method to solve such riddles.
Plants, unlike algae, tend not to have sexual stages in the tanks, so this makes a big difference also for blooms.
Regards,
Tom Barr