lessons learned this AM ....
Putting this up as my mistakesi may help someone down the road avoid them...
Last night I setup a new Fluval Spec 5. It was setup with 100% water from an established rank, filter medium from established tank, plants from said tank, some new spider driftwood and new CaribSea Eco Complete Black Planted Aquarium Substrate (no co2 yet). I put in a couple tiny fish in it and went to sleep looking at my new tank.
Woke up as usual around 5 am and turned the tank lights on. Fish were on top gasping for air. Immediately threw an airstone in as I tested water parameters.
Nitrite was off the charts.
I grabed the fish and tossed them back in the old tank. When I turned the lights on my 56gal, heavily planted, CO2 injected tank stocked with 50 or so fish I found everyone was also on top gasping for air. I ASSumed it was the same issue so I immediately tossed in some prime, moved over the air bubbler and checked for water parameters.
Obviously I now realized I treated with Prime in hopes of dropping nitrite before I knew what was going on. I should have not assumed and tested first.
I resolved my adding about 6 gallons of fresh tap water, redirecting the spray bar up, turning off CO2, leaving lights on, and keeping on the bubbler. Most fish were already back to normal with 20 minutes.
On the bright side the snails were mostly on the top of the glass as well making culling them easy this AM.
Lessons and changes on the 56g:
The slightest change to a tank may have drastic results. I slightly changed the flow direction of the spray bar the day before decreasing surface agitation.
Dont assume what's wrong with your tank. Always test before responding.
I will be adding a bubbler to the tank permanently scheduled to run only when light/co2 is off.
Lessons and changes on the Spec V:
I think I responded perfectly in this scenario. Now, I still have no idea what happened in that tank. Why was Ammonia at 0 and Nitrates so high on a tank that only 10 hours earlier was setup from an established community tank.
Anyone have any ideas on this?
Hope this experience can help another.