Dissolved oxygen

[mrsclem]

You said you have mulch around the pond. A lot of mulches contain antifungal chemicals or artificial colorings.

 

[morewater]

The majority of mulches (derived from natural sources. ie. black cedar mulch) are colored with a food-grade vegetable dye.

 

[HARO]

My guess is the new liners may have a chemical or a mold or something on them to cause the deaths???!?? You said they were new ? What kind of liner did u use? I by all means am not pretending to know this answer I'm just guessing. I hope you don't lose any more!![/QUO
If the liner was the problem, you'd have more than just TWO fish dying.
John

 

[morewater]

45mil EPDM is fish-safe.

That's one of the reasons that it's the standard in pond building. That and the fact that it's readily pliable and tougher than an ex-wife on a red-headed stepchild riding a second-hand donkey.

 

[Mmathis]

45mil EPDM is fish-safe.

That's one of the reasons that it's the standard in pond building. That and the fact that it's readily pliable and tougher than an ex-wife on a red-headed stepchild riding a second-hand donkey.

Funny! And it weighs as much, to boot!

 

[Faebinder]

You said you have mulch around the pond. A lot of mulches contain antifungal chemicals or artificial colorings.

That's a good suspicion. I have added rubber mulch. Maybe the chemicals from them did it.

Lost two more fish (ranchu and sanke opal - middle sized again), both sudden. The test should be arriving any day now.

 

[Faebinder]

The bog liner is a pvc Beckett liner ordered from amazon. Others have used it in ponds without a problem.

The pond liner is made by a professional landscape pond company. They do this all the time and brought in the pond liner.

 

[Mmathis]

@Faebinder There has to be something that we are missing.....

Was there any sign of injury [even very minor] on either of these fish?

[And just for my own curiosity, I thought that Ranchu were not normally considered suitable as pond fish since they are more susceptible to injury -- and you have them in with koi and a whole bunch of other "tank fish," like Celestial Eyes, Lion Heads, Orandas.......if I read your profile correctly. Wow! And how big is your pond? Maybe this has something to do with the deaths. Just wondering, not stating.]

 

[Faebinder]

My ranchus been a year with my other fish. Most are healthier than my other goldfish. I only have one koi. It's a 1000 gallon pond. None of my little fish are affected ironically all medium sized. My giant oranda is looking good and it's my fourth biggest fish.

No injury sign. The last dead fish has very blushing gills...

 

[Mmathis]

@Faebinder Describe what you mean by "very blushing gills." Are you describing the normal pink color or an overly red color?

 

[Mmathis]

@Faebinder When was the last time you tested your water? What were your numbers? And how old is your test kit?

 

[bettasngoldfish]

It's not uncommon for the larger fish to die first when there is a lack of oxygen (not saying that is the issue but you asked about oxygen levels)

By any chance have you added any new fish to the pond lately?

 

[Faebinder]

2 days ago last test.

 

[shellena]

45mil EPDM is fish-safe.

That's one of the reasons that it's the standard in pond building. That and the fact that it's readily pliable and tougher than an ex-wife on a red-headed stepchild riding a second-hand donkey.

Never had the luxury of a second hand donkey!! Lol

 

[Faebinder]

It's not uncommon for the larger fish to die first when there is a lack of oxygen (not saying that is the issue but you asked about oxygen levels)

By any chance have you added any new fish to the pond lately?

Yeah 7 new fish.. healthy for sure (from DO auctions) and none are sick (been with me a month).