Controlling Algae in Carnivorous Plant Water Trays with Barley Straw

Algae buildup in water trays is a common nuisance for carnivorous plant growers. Some mistakenly add algaecides like Consan 20 directly to the water, but this is dangerous—anything that kills algae can also kill your plants.

The correct use of Consan 20 is for cleaning empty trays between plantings, not for treating water with plants in it. A safer, natural alternative for ongoing algae suppression is barley straw.

Barley straw releases compounds that inhibit algae growth without harming carnivorous plants. Start with a clean tray, add a small handful of barley straw to the water, and replace it every few months as it decomposes. This method is widely used in ponds and water features and works equally well in plant trays.

Barley straw is available online and at garden centers. It's inexpensive, plant-safe, and eliminates the need for harsh chemicals near your sensitive collection.

Remember: Never add algaecides to water containing carnivorous plants. Use barley straw for prevention and clean trays with diluted Consan 20 only when plants are removed.