Pro Coral K+ Trace Elements Size:500ml They are a great base

They are a great base for sponge growth

Greater than 80% open porosity

Jen's Personal Favorite

Combine pumps from different brands to work together in sync

So why not just kill them

Pro Coral K+ Trace Elements Size:500ml They are a great baseIn the ocean, there are tiny amounts of essential trace elements such as iodine, lithium, manganese, etc. that can be depleted rapidly in household aquariums as corals and invertebrates grow. Tropic Marin Pro Coral A and Pro Coral K+ are formulated to replenish those elements in an easy to dose balanced, liquid additive. When trace element levels start to get low corals can lose their color and stop growing completely. Doser Ready Easy to use No