Iām wanting to add more substrate to my aquarium in the hopes that it will help my plants to grow and thrive. They were doing great and then they werenāt. Iām going remove the plants that are continuing to fail, and Iām going to add 2 new ones. Iām going to change the filter also because itās been a little while since Iāve changed it. Any suggestions about this? They get about 8 hours of light and thereās a skylight above the aquarium also.