Does the plant abunda giant white bacopa like coffee grounds?
The only bacopa I know is a water plant. Coffee grounds are used sparingly in the soil of terrestrial plants, not aquatic. A better use for used coffee grounds is in the compost pile, not freely cast about the garden. Instead of coffee grounds, try alfalfa pellets…..rabbit food (but without added molasses, you’ll have to ask) If you can’t find that, then just plain alfalfa hay helps many plants. There is an actual growth hormone in alfalfa. No help with the water temperature. That’s climate. Maybe when summer is over and the water temps cool the bacopa will perk back up.