Learn from my many lessons, as I have to remind my self to slow down

So one of my ac40 started leaking last night lost 3-4 gallons of water out of my 20l black tiger tank. So I decides to hook up a 2217 I just got last week in trade. As the 2213 I had on it died 2 weeks ago that is why I made the trade for neo yellows for the 2217. I also took a ac40 I had running on my red tiger tank as a extra and put it on the black tiger tank too. So I was good as they have been running on a ac30 and sponge filter for 2 weeks doing fine.

The guy swore up and down he cleaned the 2217 was cleaned and said he had it on his freshwater tank. Well hooked it up and boom no more than 30 seconds in after the water change they were all clinging to the top. Hundreds of btoe, so I shut it off and did a 30 % water changed dosed some extra prime and added some quick start I had also added some calcium montromilite as that will bond the ammonia and other such.

I suspect he was running it on a salt water tank and some dried salt water was in the hoses and gushed into the tank. I came back tasted the water after 15 min, tasted a little salty. So I did another 35% water change. So at this point I did the general 20 % I do every week! after issue did the 30% them the 35% dosed some shield some more prime and some start. As some were clinging onto the top the sides and some were on their sides and backs twitching.

So did another 20% dosed some more start and prime! some more calcium montromilite! and left as we had my wives mothers birthday.


Came home and only 4 had passed, and the rest were doing fine. Still some sluggish ones but most were running around like normal