Join Date: Nov 2018
Location: Oil City PA. USA
I'm not trying to be smart or mean here. If you used live plants this would not happen. As far as cost goes, live plants are inexpensive, most beginner plants do not need any special care or anymore than low light. They can be floated for overhead cover, or planted in almost any substrate. They help keep ammonia down, and the nitrate given off when the ammonia is being broken down by your filter, feeds the plant. Planted in substrate they give hides and resting places.
When Silk plants start to break down and the wires get rusty the metal inside breaks down into heavy metals and build up in the tank. Even treating with prime or any other water conditioner does not continue to remove these metals. The oxides get trapped in the filter and remain there.
I think your absolutely right in the cause of loss. Plastic and wired silk may look nice at first and maybe for regular fish they do fine, but Betta are a total different fish. Plastic tears fins and at times has been known to trap a betta to the point he can't get lose. Silk, and depending on the type can also cause fin damage and if a wire is exposed over time What you just found out will happen again.