As for other ground animals, none close enough to be a problem. I can't even pee that high to hit the unit so I doubt that they could. 
Sorry Andy, I was meaning the filter was to be used as a temporary fix, until you have the problem solved, or even a reduction in the building not a permanent solution.[emoji12]Thanks for the replies. I already did these tests and even with air coming from outside, there was still traces of ammonia showing up in the water, just not as much. So it's in the building. The exchange of gases through the bubbles gets it into the water. Even standing water showed a slight amount of ammonia when it was tested 24 hours later. It started out with 0 ammonia. After the 24 hours and adding an airstone, the ammonia level increased. That has to confirm it's in the building. The A/C- Heater does keep the place at 78 as set so I have to assume it's working properly or it would be hotter or colder in here even with the insulation. The darn air quality test would have answered that question visually but as I posted earlier, the test was expired and I heard from the seller that they have no others ATM so I am looking into getting another from another source. The results from that would/ should tell me if there is stagnant air in the area of the compressor, tanks or rows however, I have now tested water in both rows with similar results so I doubt the problem is "stagnant" air as much as it's something coming from the unit within the cooled air. I need to test the air quality with just the heater running and just the a/c running but the heater wasn't running nor had been ever run at the beginning of this whole thing so I am 99.99999% positive that if the unit is to blame, it's from the a/c part. I don't want to call the company about it until I get confirmation that the problem is in fact the unit. (I like to go into battle with all my facts first.
As for using charcoal filters, I looked into them and not convinced they would help but for the size of the building, the cost of an air purifier system is too much so the fish need to either adjust or go somewhere else..... ( Poppa?
As for "....you paint your own cranks or are you making plastics?", neither. I make jigs but this all started before I was doing any of them in the building so they are not the problem. I do use powder paint but that is exhausted out a window behind the painting area ( which is also the other side of the building from the compressor intake) and the liquid paints I use are water based. Any other types of painting is done outside the building as always. So I can rule out anything on the lure side as the problem 99.99%. The only thing on that side that could be an issue is the new work bench I built using pressure treated lumber. But there is not a lot of it within the bench so I sincerely doubt that is the cause. The rest of the wood is white wood. Air quality test would confirm my hunch.
So for now, I wait...........
No stray cats here. The Alligators or Bobcats or Panthers keep it that way.
The use of cycled sponge filters does not allow for me to use anti fungals on the eggs and when I tried that, the hatch rate went way down and the fry still didn't survive. The reason is that the nitrate level gets too high too fast for the fry so they are best hatched in unfiltered water then added to water that is filtered with a sponge filter. The long version of the process is that when you first put a sponge filter in with the fry, it should have nothing to live off of due to the fry secreting very little waste. When I hatch them out in just water then put a filter on them when they start free swimming, the excess food is the first real food source for the nitrifying bacteria and since from there you are doing daily water changes, that prevents the nitrates from building up. In this case, I cannot create clean water to hatch the fry in because as soon as the water is bubbled, it sucks the ammonia into it. It's a bad catch -22. The proof of this was the rain water. If it happened in there, then I know it's from an outside source.
)
I still count at least 35 new ones. So at least I know that if the Angels fail, I can still do Plecos and Guppies. 
) Now, I get someone to come to the building and check it out on Thurs. so I will know more when that's all done. So now I am hoping that once the a/c issue is resolved that no real permanent damage has been done to the breeders and life can get back on track. I won't know this for sure until I test spawns in good water from start to finish. Right now, I haven't trusted any water so I hadn't been doing any water changes in with the fry or eggs and we see how that turned out. So the thought process needs to change once again as to what I do breed in here. 
Actually, it didn't. It effected the cory cats too. But here's why only the egg tanks: the other tanks all have sponge filters in them so the ammonia is being converted biologically before it accumulates and effects the fry in the tanks. With the eggs, Cory and Angels, these do not have biological filters in them so that I can use antifungals on the eggs which in turn lets the ammonia build up from the exchange of gases and THAT's why it appears to only effect the Angels. I also lost about 40-50 cory fry that hatched and the day they were supposed to start free swimming, they pooped out too. When I tried to do the eggs without any antifungals, more died before hatching and when I tried to do the eggs with no meds but with sponge filters from the start, the nitrate levels rose too quickly and apparently the fry died from that. ( I was using 2 gal tanks for hatching and with an established sponge filter in that size tank, it was just too much. ) My original way uses clean water ( which I couldn't get under the current conditions) and any ammonia buildup wouldn't happen until the fry had become free swimming and at that point, daily water changes would have been being done so there was dilution from the start and once the fry were free swimming, I also added a sponge filter so between that and the daily water changes, ammonia buildup and subsequent nitrite/nitrate issues wouldn't happen. But with this condition, there was never the ability to have clean, aerated, same temp fresh water for the fry so they were sunk from the start.
The cory fry kinda made that clear as I hadn't been able to hatch any Cory egg before I used peroxide but when I did, I got a huge hatch. Problem was, I also had a sponge filter in the tank as well but the peroxide sterilized that as well so it was like I had no filtration and whammo, no fry either. Never give up. They are a wonderful fish to breed. If enough people try to correct what's wrong with today's Angels, it will make my job a lot easier.
