<span class="link_user">@Metamorph</span>, every cup have stones on inside bottom and its easy to the water fall on black plastic recipient 1m2 and all base it's on 7° inclination.easy to clean and maintaining .
<span class="link_user">@Metamorph</span>, can you be concretely, i follow the table of nutrients from canna , ph , air circulation and every day check everything.