Quote Originally Posted by IAmKowalski
I've used rinsed pea gravel with great success, flooded three times a day using Flora Nova nutrients. You just have to rinse it a few times first to get rid of all of the sediment which would probably tear up your pump.
I am doing the same thing you did. I am just using lava rocks as I have seen a vid on youtube stating they could be used in hydro setups as an alternative to clay rocks.
seems to be working.
Just rinse rocks before use as they are very dusty.