Hi..

If you want to save the eggs, you'll either have to remove
the Pleco or the parents to their own tank.
Personally, I'd put the parents into a tank of their own.
That way they can spawn and raise their fry in peace.
It's a lovely sight to see..... parent fish taking care of
their fry as they grow.

Absolutely..! 30+ years ago my very first young couple
spawned in a huge marine mussel shell..

--
cu
Marco from TFA (The Freshwater Aquarium), a former fighting
fish keeper and multiplier who loved to read your latest
original posting about fighting fish's needs..