Hi Rafael,
That sounds clearly …..
Let’s make a new date and do not loose good mood!
What kind of filter do you have? Inside filter? Is there a opportunity for a small fish to go inside?
I have put on all my filter incomings a piece of foam, because before I found always shrimps inside.
And once three young Tanichtys micagammae swam up the waterfall of my rucksack filter and survived inside except one, but I found them early because I missed them. I set the filter then higher and my actual rucksack filters have got a sieve net in front, so I hope no fish tries to swim up to find a new territory ….
Even behind my first Hamburger Mattenfilter for my linkei I found four offspring. So I have changed it with a more finer one.