6 month old tank 40 gallon tank with aragonite and dead base rock. Everything was going fine until the last fish was added (3 fish total). Experienced a total tank wipeout from Velvet...yes I know...now have a QT
I emptied the tank (minus the sand), let it dry for a week...did not use any bleach or cleaners.
I refilled the tank (with the existing sand) and started the raw shrimp method of cycling.
Here's the thing...
I'm 2 weeks into 'new cycling' this tank and I have had no ammonia at all yet and the shrimps are almost completely gone. I also have nitrate readings of 20. Is it possible that I'm not going to cycle again and that all of the bacteria survived in the sand bed?
I'm currently letting the tank go empty for 6 weeks to make sure that the Velvet disappears...but am a little clueless as to why I wouldn't at least mini-cycle with 2 raw decomposing shrimp in a 40 gallon tank.
Any help suggestions u can provide would be great. Also I used cupramine in the tank...can I just use Carbon to remove it once I'm outta cycling hell?