My Dog has been throwing up? black mold?

I have had my dog ludacris since he was 6 weeks old he would be 4 thid may he was a perfectly helthy dog then we moved into this house and lived there almost 2 years my dog in november started dropin weight i thought it was cause we were away and he had anxietty cause he started gaining it back for about a week then he started throwing up and lost about 15 pounds we thought it was worms and made a vet appointment he died 3 days later on christmas from severe kidney disease. We found out that there was black mold in the house and moved out in march. But my problem is my other pup samson we got him a year ago when he was 3 months old he would throw up like 3 times a week the whole time we lived there (i thought it was acid reflux) then we moved into our new house where there is no black mold and he only threw up 2 times the first two weeks and hasnt thrown up again till this morning like yellow flem? But this is the first time in 2 omonths does he just have a upset stomach today? and did we fix the problem when we moved out of the mold infested house?