Help, I've got moldy guppies

[Corbidorbidoodle]

Nitrate- 50

Nitrite- 0

Amonia- 0

Hardness- 300+

Buffer- 0

Ph- lower than 6.4

Temp- 75ish but I unplugged the heater to slow down the disease.

I've got a tank where I put my plant clippings to grow an there's gobs of guppy fry. I've been occasionally seeing these mouldy guppies and throwing them out from time to time. Always very pregnant females. Just noticed the first moldy fry though, so I should probably take care of it... 

It looks like they're moldy. Always on their sides/back. Almost always on their left side, weirdly. White, definitely looks fluffy.

I added a Tbsp of salt/gallon. Lowered the temperature, and added a dose of Artemis Micro Lift. I'll buy some Maracyn tomorrow.

What do you think this is? do you guys like for treatment? 

Edited May 20, 2022 by Corbidorbidoodle

[Corbidorbidoodle]

Here's a picture I got from some other forum thread.

https://www.aquariacentral.com/forums/attachments/fungus-on-guppy-jpg.94916/

[Corbidorbidoodle]

Oh, and I should add that it doesn't seem to be affecting the behavior of the fish at all. Still swimming around well and difficult to catch and remove. (Cuz they're fast)

[quikv6]

It could be fungus or columnaris....both of which can be the symptom, and not necessarily the cause of the problem. With a KH of 0, and PH Below 6.4, I think it may be difficult for guppies to thrive. The KH of zero can cause a rapid PH crash, causing the issues.

[Colu]

I agree @quikv6 zero kH and low pH are more than likely the cause have you got a picture of the sick  it will help with a diagnosis

[Corbidorbidoodle]

Good call. I've been reading about the Kh effect on Ph. I didn't really realize that Kh is depletable. I'mma get some stuff to correct that today

[quikv6]

By stuff, I would recommend some crush'd coral, both in the substrate, and filter, if possible. It's more natural with less potential for error than the baking soda/"PH up" methods.

Edited May 20, 2022 by quikv6