That Fish Blog – Aquarium Advice and Information

Hello, Craig here again with with another answer to a common plant problem! This time I’d like to address a problem some aquarists have with Cryptocorynes. Crypts are generally described as hardy, low maintenance plants, but not everyone finds them to be that way.

Why do my Crypts look like they’re melting?

So, you are standing in a fish store and over hear someone talking about Crypt Rot. Sounds pretty nasty doesn’t it? They aren’t talking about mummies or some weird disease you get from exploring pyramids. They are talking about an unfortunate problem with an otherwise very sturdy group of plants known as Crypts.

Members of the Cryptocoryne genus are well known and well established within the aquarium hobby. The most popular of the Crypts, Cryptocoryne wendtii, is tolerant of lower light, higher heat, and just about anything else you can throw at it. Though there are some types that can be tricky to keep, the species that are regularly available to hobbyists are certainly considered to be among the most reliable and versatile plants around. Read More »

Hello, Craig here again! With 15 years on the retail side of this hobby, I have been asked a lot of questions, many of which have been centered on the well-being and growth of live plants for the freshwater aquarium.  In my next couple of entries, I thought I would explore some frequently asked questions about aquarium plants. Here we go!

Why is my sword plant losing leaves when I just bought it?

As a general rule, most aquarium plants are not actually true aquatic plants. Most of them are found along the banks of rivers, streams, or lakes. This is the case with Echinodorus sword plants. In their natural environment wild Echinodorus are very rarely fully submerged and some individuals may never be fully submerged. Rainy seasons are part of what allows hobbyists to keep these beautiful plants in a fully aquatic environment!

When swords are cultivated at an aquatic nursery, they are typically grown in a bog like setting, or even grown hydroponically in a greenhouse. The growth rate of an emerge-grown sword is more rapid and transportation and shipping of that plant tends to be safer than if the plant was grown completely submerged. Knowing that the plant has been grown emerged helps to explain why some of the leaves die off when you get the plants to your home aquarium.  It helps to explain why, even though you have a nutrient rich substrate and bright light, your swords still seem like they are dying. When that plant is fully submerged in water, the growth form changes somewhat. Those long, rigid stems and smaller leaves that you see will begin to decay shortly after the plant is placed fully underwater. Once you see that emerge-grown leaf start to turn brown, simply clip it off near the base of the stem and the plant will pop a new leaf out to replace it. This new leaf will grow from the center of the sword’s rosette and will often have a slightly different shape and/or color. The new growth may start slow, but adding the proper nutrients will ensure that the sword maintains growth. Fortunately, most plants make the transition to fully submerged form rather quickly and easily!

So, next time you see a big beautiful Sword that you can’t resist , just show a little patience and give it a little pruning. You will be amazed how resilient swords can be!

Thanks, Until Next Time,

Craig