Buying macroalgae online is a fantastic way to get rid of nitrates in aquarium easily and naturally. Due to the reduced nitrates available, nuisance algae is starved out and will naturally be reduced. Our aquarium macroalgae can be housed inside or outside of the display tank. Algae like Chaetomorpha or grape caulerpa are best kept in a separate tank, like a sump, which has its own light source. These types of plants can be very invasive and can quickly smother slower growing corals if removal is not part of your weekly maintenance plan.