If you can get one of these where you are it is probably the best all round for quietness and sufficient 'as it is' for your quarantine tank, there is a great video attached, you probably won't want the air line if you want quietness though! If you watch the video you may find you can replace the supplied sponge with an already used bacteria full sponge if you have one available, otherwise if you put the supplied new sponge in an existing tank for a couple of weeks (just float it in the tank) to get bacteria into it? This will slightly delay getting the fish, assuming you haven't already got them........ You may be able to get one of these on your local ebay or amazon?
Sponge filters can be noisy if not set up properly.... one method of quieting some (depending on style) is to put an air stone at the base of the sponge filter, making smaller bubbles. Another method is to have the 'out-take' of the sponge filter just above the waters surface. It still makes noise, it's just quieter.
In the bird world, a minimum of 30 days is recommended for quarantine (which is hard for most people to do effectively), although up to 90 days can also be recommended. I know that one shrimp supplier does 30 day quarantine for new imported shrimp. I don't know if there's a standard set in the fish world.... but I have both quarantined fish and not quarantined fish. The fish I quarantined I struggled to keep alive, but not quarantining them didn't guarantee survival either... I only have shrimp tanks now, although I did add fish to one of those tanks, without quarantine. No other fish in there so no 'real' reason to quarantine, even though I did source the fish from two separate locations (just because first option only had 2 and they do better in groups). I *think* they are doing fine, but they are a species known for hiding and don't usually all come out at once so hard to say for sure.
Sorry to hear you have lost a shrimp. How many are there left in the tank?
I wouldn't act to hastily and start treating for something that may not be? Maybe it just died and you will never know why if it had no symptoms? Just keep a close eye on the rest for now! Maybe the BKK weren't very healthy to start with if they hadn't grown as expected, though also there may not have been sufficient food, but that is less likely if the others in the tank have grown!
I would feed the shrimps as the grazing area is fairly limited (I assume this is your 80L divided into 4) but sparingly, maybe twice a week. Crush up a pellet into almost a powder, then dip a pin or similar a couple of mm in the water, then into the food, then back in to the tank will give them something different to eat to supplement their diet.
I would check the temperature of the water as well as when my old setup overheated they started going an orange/pink colour?
It is good that you obviously spend time watching them as they are fascinating to watch and very calming!
Perfect. I've got a spare heater, can source a tank and filtration, have cycled media, and have a simple light if ambient light isn't enough.
Pretty random question - are sponge filters super noisy? I've never used one with an air pump, and the qt tank would go in my bedroom; but only if I could actually sleep 🙂. Otherwise, is it cool to turn off a filter at night?
Usually a week or two should be enough with careful observation to see if any symptoms develop.
No. But it depends on the filtration. If you use a mature filter, then you don't need to cycle a quarantine tank for very long. I just use the water from my water change to fill a quarantine tank. And some old filter media floss from a mature filter in the quarantine tank's canister.
The quarantine tank is very basic, no decor, no substrate, nothing. Except maybe some lights to check for diseases after a week or two. You can get away with lights, and use a hand held torch even.
Just a heater.