Hi Oldfishlady, I thought water quality is the key to successful breeding. Why do people here still have problems with breeding and only get a few survive to adult.
In 1981-1982 I randomly counted the fry of spawns which averaged 1000. So 200 is a bad result IMO. That's why I gave up caring for the fry and just accept what I get (my average is 200-300 if I care for them).
I don't want to post this publicly to avoid discouragement (?) and offend people. I hope you don't mind my messaging you like this.
Anubias-nice plant that needs to be tied to something-like driftwood, rock, decoration with a cotton thread, you don't want to plant it in the substrate because it can cause it to die. It is a low light, slow growing plant and great for Betta tanks.
I don't think it is age related, I would still do a water change to rule that out as part of the problem.
A good rule of thumb so-to-speak...anytime you have a behavior change-check the water temp and make a water changes even if you just did one earlier in the day or week.
To rule out environment at part of the problem-anything could have fallen in the tank, hands, sprays, oils etc.....and water temp is also very important to check.