Athosanswered grow question 6 years ago Do raise your day temps at least above 23°C (73°F), bellow that the growth is really slow. pH should be between 5.5 and 6.0 for best results and the pump setting depends on your pump, no way to really tell it's not science. Just be sure there's enough bubbles for all the plants; to this end consider using multiple airstones.