Cloudy water in QT

sneeyatch

Active member
A little while ago, I QT'd a Royal Gramma and a Lieutenant Tang and set up the hospital tank with the typical bare bones equipment. It's a 20L with a HOB Aquaclear filter, a 50 watt heater, a single MJ1200, an ammonia alert badge and a standard AGA strip light. Nothing special.

Due to cycling issues, I've stocked up on filter sponges and let them colonize in my display's sump for literally months and use those on my QT. I set-up this tank by doing a waterchange from my display and thought everything was good. No spikes or anything, but I would get cloudy-ish water...

The medication I use is Paraguard and I dose daily per the instructions on the bottle and follow a dosing regimen from what I can find on-line + using common sense.

Since it was a QT tank, I really never saw the need to top off with RO water, so I used de-chlorinated tap with Prime. I thought the tap water was the issue with the cloudiness so I kept an eye on everything and when time was up, I transferred the fish to my display. All is well.

I drained the QT and stored it for about a month, then recently set it back up to QT a mated pair of maroons that I picked up from a hobbyist getting out. Thinking of the cloudy water issue, I top off now with RO/DI water. I'm using the same equipment, same medication and haven't changed anything else.

I was thinking that it was maybe a bacterial bloom, but it doesn't go away, it just lingers around not getting milkier or anything, but it's there. Fish aren't showing any signs of distress and eat like pigs.

Should I be concerned? Would the medication (Paraguard) cause this? Friends of mine use Paraguard with no issues...

Can't figure it out.

Thanks for any advice.
 
Are you still adding the prime this time around? I am thinking no since you were using it to dechloronate the tap water.
 
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