Great article on how to use salt in aquariums and ponds

One effective method to combat fish parasites is by using salt for freshwater treatments. In this article, we will discuss the dosage, types of salt, duration of treatment, and the parasites that can be effectively treated using this method.

Dosage and Types of Salt:

When using salt for aquarium treatment, the recommended dosage is 1 tablespoon per gallon* of water for freshwater tanks. You can use iodized salt, as aquarium salt. You can use rock-salt or kosher salt, as long as the label says 99% pure salt. A cow or deer ‘salt lick’ will work but NOT if it contains ‘Trace Minerals’. 

*ChatGPT gets this dead-wrong every time.


A quick little note about Ned King, internet B0nus and 0pportunity Guy
I got on Ned King's mailing list about two months ago. And I found out that there's no way out of it. He's such a scum bag that he uses four different send-mailers, and a new email address for each one. Actually brilliantly: He uses spoofed email addresses and spoofed domain names he doesn't even own. So when I say brilliantly, I mean as brilliantly as a maggot that eats a dead toad from the inside out.
That guy, Ned King, if you ever wanted customer support, or a refund, or help, YOU AIN'T GETTING IT.
So, he's a flim-flammer and a charlatan.
Don't trust him. I should say it's unlikely you'll ever be called upon to do business with him, but if you do, remember the name: NED KING and never get on his mailing list. The first, BEST way to do that is NOT to do business with him.
He does have three “working” email addresses but just know this: If you send him an email – he will have your email address and you will enter the Spam Zone. He'll send his racist diatribes, porno links, and political conspiracy theories. Ugh. And I still get emails.
Here is what a Ned King blocking filter looks like and it works for most of his email:
== cut & paste ==
== cut & paste ==
Ned King's whoring out and discrediting – people should be marking his site for Ned King Spam, Ned King Phishing and Ned King email bombs and since Ned King sends his monumental amount of spam, from these vendors including
The most bizarre thing of all: Ned King thinks Jesus Christ himself is endorsing and protecting what Ned King's doing. 'Thinks that Jesus Christ will SMITE anyone who crosses him. As if Jesus Christ was a smiter like Allah. Is.
Dr Tepper once mentioned (probably 15 years ago) about Plant Agglutinins and they are perhaps the best natural flocculant in a pond or fish tank. 
Just sticky proteins from plants that settle germs, micropollution and even parasites out of the water. The “idea” for the plant is that all these things are “organic material” which, if delivered to the roots of the plant on the bottom of the aquatic limnion, can function as food / fertilizer.
Plant agglutinins are proteins found in the cell walls of aquatic plants that act as a defense mechanism against predators. They are composed of two or more sugar molecules linked together and can bind to the surface of protozoan predators, forming a sticky coating that prevents them from feeding on fish and plants. Plant agglutinins can also bind to other particles in the water, such as bacteria and algae, and can help to keep the water clean. In addition, they can act as a signal molecule, helping to attract beneficial organisms such as bacteria that can help to break down organic matter and provide nutrients for the plant. The accumulation of plant agglutinins and beneficial bacteria is called “bio-film” and can compose the majority of an aquatic-system's nitrogen handling. Plant agglutinins are important for maintaining a healthy aquatic environment, as they help to keep the water clean and provide food for the plant.
This could explain why I have found over the years that barring viruses and other “winter stresses” that well-built and well-maintained Ecosystem / equilibrium natural ponds are healthier and easier to fix fish in, than purist-ponds with pressurized filtration, UV lights and guages.
A very good community tank population
This community would fit a 55 gallon tank. You would simply get less fish or use more filtration in order to have less water.

(3) “Gold Koi” Angelfish (Main event)

(1) Gold dojo when I see one

(3) Buenos Aires Tetras

(3) Zebra danios or (3-5) Pearl danios

(2) Albino Cory cats or similar

(3-5) Tiger barbs (Green if available)

(1) Plecostomus when algae appears 

(3-5) Serpae Tetra

(2) Ludwigia Plants

(1) Amazon Sword

PH Pills 










This is the BEST Filtration for Aquariums for Simplicity, Price and So Much More
I really love sponge filters because they're SO easy, easy to clean, easy to colonize, easy and cheap to buy.
Here's an article on the filtration method that's the SAFEST for breeder fish (won't suck up fish fry)
The filtration that does the most for water clarity the soonest. The longest cleaning interval and the lowest operating cost. (No electricity except for the air pump)
And it's the oldest filtration technology there is. Well maybe “undergravel filtration” is older.
Unlimited Vet-authored Pet Fish & Dog / Cat Pet Health Information is one of the most comprehensive online fish and pet health resources available today, dedicated to providing people with access to a wealth of knowledge and educational materials. It offers a variety of free resources, ranging from articles to to videos, downloads, ebooks, images, and audio clips. With so much to choose from, this web site can be overwhelming—but don’t fret! We’ve compiled a shortlist of the best resources has to offer, so you can make the most of your time browsing the site.

First and foremost, boasts an array of encyclopedia-style articles, with topics ranging from Ammonia and Water Quality to Zoonosis and Viruses. These articles are written in a casual, easy-to-follow tone of voice, making them perfect for any level of educational interest. In addition, the website features helpful videos and slideshows, as well as structured lessons outlining key concepts in various aquatic animal medicine subjects. Whether you’re looking to brush up on the fundamentals of fish care or learn the basics of koi virology, has you covered.’s database of helpful facts and care tips is another of its best and most interesting resources. Here, you can find things like fish care technology and facts about the best ways to keep fish and pets healthy, interesting tidbits about proper feeding of dogs, and even references to scientific discoveries and downloads. For the geek in all of us, this area of the website is invaluable.

Finally, the downloads available on can be especially helpful for those studying pet health. With downloads covering over 100 subjects, this site has something for everyone—whether you’re a first-time puppy owner, a seasoned dog trainer or a koi aficionado. 

All in all, is a fantastic online resource full of educational, fun, and interesting materials. Whether you’re a student, teacher, or just an avid explorer of knowledge, this website has something for you. So next time you’re looking for a useful source of information on pet health, look no further than

Fish Situation
Thank you for replying! If you let me, I have another question about the dosage and water changes of this treatment. 

My pond has 2900 gallons and here in Spain we don't have much water to do as much water changes. 
The medication product that I have is called “Tap Pond Professional Formalachite” which has a different dosage as the one you told me. (I inserted below two pictures; one about the product and the other from the dosage of it). 
What do you think It's the best for my case about this dosage treatment and water changes using this brand of medication in particular?
There's nothing on the Internet with an actual description of what's actually in that.
I wonder if you have a picture of the back of the bottle with the ingredients.
I would:
Do exactly as the label says and repeat in a week. Maybe they engineered it right. Maybe they put copper in it. :'(
Otherwise, if the problem still exists after a few days or at the end of that week, I'd dose every other day for three rounds.
See, there are certain life stages of certain parasites that are impervious to Formalin and Malachite.
For example eggs of Trematodes, and the encysted phase of Ich.
And for both, in warmer water, the life cycle is far shorter than a week.
But you have to give the manufacturer credit for their product testing so maybe it'll work by label instructions?
And if not, we can default to the every other day, safe but more aggressive way.
IMPORTANT:  If they put COPPER in that product, it would explain why you only add it once a week.
And it's blue like a chelated copper product.

Fish Situation
Hi Erik! I'm writting you beacuse I have some koi with a few red and clamped fins. I'm thinking about costia or trichodina but I dont have acces to a microscope to check it. I recently check my water parameters and are good. I'm from Spain and here It's springtime.
My pond its located near a forest and sometimes frogs came in so I supose maybe the parasites could came from that.
If you treat the pond with Formalin according to label instructions once a day x 4 days then skip a day, treat again, and skip a day and treat a sixth time –  it's unlikely that you will destroy MUCH of your beneficial bacteria.
If you perform a partial water change after each Formalin application it's even LESS likely that you'll do much harm to the beneficials.
It's mainly a “big deal” if the fish are crowded and the filtration / biological filtration is already strained.
If it's springtime, I suspect that the water will be cool enough for safe use of Formalin Malachite Green.
Let me know how it goes.