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For real, it's a mixed bag. My crew's in 320 ppm, but I buffer with peat in the filter. They're cool with it, but I'd never try wilds in this setup. Tank's 100 gallons, blackwater style, with oak leaves and low light.

Yep, bacterial bloom is likely. I had the same issue in my 55-gallon. Added a UV sterilizer and it cleared up in days. Also, cut back on feeding for a bit. Discus don't need as much as you'd think.

I've seen this too! My discus chill out when I feed them in smaller groups. Maybe try dividing the tank with a temporary barrier during feeding? It's worked for me. My tank is 55 gallons, 5 discus, no other fish. I use a sponge filter and keep the temp at 82F. Water changes every 5 days.


Yep ...

Sand's the way to go, imo. It's gentler on their delicate barbels and looks more natural. I've had mine on fine white sand for a year, zero issues. Just gotta stir it during water changes to prevent dead spots. My crew's thriving, 6 adults in a 90-gallon with a pair of Eheim filters.


Yep ...

I've got a small school of White Cloud Mountain Minnows in a 10 gallon tank, but they seem kinda skittish. Water params are good, 0 ammonia, 0 nitrite, 10 nitrate. Temp's at 72F. Any tips to help 'em chill out?


How many minnows do you have? A school of less than six might make them feel ...

I've got a small school of White Cloud Mountain Minnows in a 10 gallon tank, but they seem kinda skittish. Water params are good, 0 ammonia, 0 nitrite, 10 nitrate. Temp's at 72F. Any tips to help 'em chill out?

I've been doing a 30% water change every 10 days, and for the Thrive, I follow the bottle instructions, which is 1 ml per 5 gallons, usually once a week. My tank's well cycled, so ammonia and nitrite stay at 0, and nitrate's around 25-30 before the water change. pH's 7.5, but I don't have a way to ...

Honestly, I used to think the same way and was having huge problems. Plants weren't growing, algae was taking over, and I inject CO2 - the last thing I wanted was for it to escape into the atmosphere. I EI dose dry fertilisers and have my lights on for 7 hours a day.

The only big change I made was ...

I had a similar issue in my 65-gallon tank recently, and it boiled down to water flow. The fertilizer nutrients just weren't being circulated effectively around the plants.

I've since adjusted the setup - the filter outlet is now a spray bar, and I've added a power head just beneath the water's ...

I'd love to help you troubleshoot, but more data would be fantastic. That being said, I think we're dealing with a nutrient issue, likely tied to an imbalance of light and nutrients. I've taken a look at the Thrive site, and I'm curious - which of their liquids are you using? There are 11 ...