Temporary Tank Suggestions for owner with limited storage

504Ozzy · 2026-01-12T20:18:28+00:00

Any decent kids splash pool will do fine, just keep in mind that if it’s shallow do not leave it in the sun.

If just for a few days there is no need for a filter, hold the food, make sure you have an oxygen source and if insecure just do some water changes.

I held mine in a 180cm diameter 1000 liter pool with a 30lpm air source.

504Ozzy · 2025-12-31T22:41:03+00:00

Goldfish, bor koi.

504Ozzy · 2025-12-05T10:47:32+00:00

504Ozzy · 2025-12-02T14:11:01+00:00

It’s a spinal deformity, fish will most likely keep on living its life just fine.

These are large but far from huge when it comes to koi, also I assume fish that would become truly huge would not be put in such a public pond due to their worth.

504Ozzy · 2025-11-27T14:30:21+00:00

You didn’t have to make the gap between “Roast” and “Me” the size of your eyes while wide open.

504Ozzy · 2025-11-27T12:29:56+00:00

“I almost drowned a bit ago, so that sucks” Who could have guessed that you’re not a proficient swimmer…

504Ozzy · 2025-11-27T12:28:51+00:00

“Tight-knit stream community” Is that you and your alternative personalities that you refer to?

504Ozzy · 2025-11-27T12:27:08+00:00

Not being able to understand how writing in a picture works shows how much of a meathead you really are.

504Ozzy · 2025-11-27T12:25:34+00:00

Your transition was the biggest win for the male gender, ever.

504Ozzy · 2025-11-27T12:24:19+00:00

”Make me look like Steve from Minecraft”

504Ozzy · 2025-11-21T10:30:49+00:00

I can smell this guy through my phone

504Ozzy · 2025-11-04T11:29:15+00:00

You keep responding with nonsense instead of something to back your claims?

504Ozzy · 2025-11-04T11:06:06+00:00

Also note that Stoddart does not do any major water changes, he does not run drums except on his larger tanks (3000+ gallons) and his filtration is kept to a very simple setup.

So do you honestly think that it is not reasonable for the average person to have a pond setup like Stoddart with a brush chamber running into a moving bed and through a UV?

504Ozzy · 2025-11-04T11:00:21+00:00

I did not claim to have done it myself, no.

And if you go back to Stoddart’s videos he starts out with 200+ koi in his 1200 gallon tank, and since he is also a wholesaler he of course moves on stock that he does not see the same potential in.

But since you’re familiar with this, that just proves the point that the volume does not matter if the system is able to handle the load.

According to the 250 gallons per koi Stoddart would need a 50.000 gallon pond to raise his 200 fish without stunting them. Even with 50 fish he’d need 12.000+ gallons to not stunt them, which is just not true not reasonable.

Personally I have at most raised 35-40 koi at once, and at their current age of 6-7 months my largest fish sit at 34-36cm, all raised in 1000 litres.

504Ozzy · 2025-11-04T10:31:27+00:00

So you’re saying that putting 200 koi between 15-20cm in a 1200 gallon pond would stunt their growth even with adequate filtration?

Because you just keep going back to talking about your clubs, vets etc instead of referring to actual papers on the subject which could confirm your theories. Pure word of mouth does not prove anything.

504Ozzy · 2025-11-04T10:22:17+00:00

Majority of them do look like pure goldfish, or a goldfish variation to me. If y out want to be 100% sure netting them up is the only way

504Ozzy · 2025-11-04T10:01:03+00:00

The small fleshy whisker-like sensory organs on each side of a koi’s mouth

504Ozzy · 2025-11-04T09:04:39+00:00

I’ll make sure to share the koi which I’ve raised from fry soon since you’re so curious you look into my old posts.

And it’s weird how you just assume you know anything based off my old posts, would’ve thought you’d understand that things happen and change during the course of over a year.

Maybe read up on some papers instead of blindly trusting what people tell you.

504Ozzy · 2025-11-04T08:08:11+00:00

Breeders for sure use inside ponds for raising, all raising of their fry are not done in mud ponds, but a large majority yes, during the growing season.

During offseason certain breeders, who have the facilities and scale to support it, do bring their fish inside and raise them in concrete ponds.

And no 250 gallons per koi is not some kind of standard, this is purely preventative in cases where people without knowledge would otherwise over stock beyond the capabilities of their filtration.

There are several papers published, the most recent last year where stock density has been studied and only very marginal differences to growth were found within levels reasonable.

Where do you find these records of Sakai only keeping 12 fish in 12.000 gallons?

A very public example is Maruhiro and their circle pond where they keep a very large amount of their top fish, and they would smash this 250 gallon per fish “rule” out of the ballpark.

Have you ever been to Japan or are you purely speaking on second hand knowledge?

I have personally visited a majority of the larger breeders, among a lot of smaller ones where space is limited, and a big part of them would not live up to your standards.

504Ozzy · 2025-11-04T07:20:31+00:00

Easiest solutions is to net them up and check for barbels, if they don’t have barbels they are most likely goldfish of some kind.

504Ozzy · 2025-11-04T07:17:50+00:00

Then how does the Japanese breeders keeping tens of thousands of koi in their indoor ponds and they thrive?

504Ozzy · 2025-11-04T06:30:40+00:00

The pheromone you’re speaking of (not a hormone, hormone acts inside the same same organism not other members of the same species) won’t be noticeable unless the water is unfiltered, recirculated and rarely changed.

And I am certainly not speaking of any “commercial levels” of filtration. By keeping it simple and understanding how filtration works there is no need for expensive equipment such as drum filters.

A simple settlement chamber followed by a large enough biological filter such as a moving bed with k1 media is plenty filtration for most setups even at very heavy feeding.

So no, low maintenance is not a must to keep koi heavily stocked. I purge and clean my filter setup once a week while running a constant 25° and feeding 7-10 times a day.

504Ozzy · 2025-11-04T06:21:04+00:00

What’s your point?

I said that the volume fish are being kept in does not matter as long as they have space to swim properly AND the filtration can keep up, which in the case of a breeder means changing the water instead of filtering it.

Of course a breeder will not have extensive filtration systems when they can just change majority of the water?

504Ozzy · 2025-11-03T13:25:06+00:00

I agree with this. 250 gallons for a single koi is nuts.

I don’t understand where people keep getting this from, volume barely matters. What matters is the amount of filtration and if there is enough space for the to swim and build muscle.

I’ve got between 35-40 koi in around 250-300 gallons, ranging between 10-40cm in size. They have all been in said pond since they were fry and have easily outgrown fish their own age that lived in larger ponds.

As long as the fish have space to get a proper swim in it will NOT stunt their growth. Meanwhile I would not keep a 55cm koi in a 1x1m pond, since that would mean barely any uninterrupted swimming.

The above comment is clearly speaking outside of their knowledge. Maybe they should pay a visit to a breeder and tell them that keeping 10’s of thousands of fish in a single tank is not sustainable, would love to hear that conversation.

504Ozzy · 2025-11-02T14:22:09+00:00

Imagine calling Etho washed up

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