That Fish Blog – Aquarium Advice and Information

Green water. Nuisance algaes. Cyanobacteria. Poor coral growth. Random invertebrate death. All of these are problems found in freshwater aquarium, ponds and saltwater aquariums and leave many aquarists stumped. Most of them can be diagnosed with one simple water test however – the often-overlooked Phosphate test.

What is a Phosphate and Why Should I Be Concerned?

Phosphate is a naturally occurring compound with several sources in aquariums and ponds. The most common may be the source water used. Some municipalities and well water sources naturally contain phosphates. It can come from the soil in the area or from run-off into the water sources, especially in agricultural areas or areas that use a lot of fertilizer (phosphate is one of the main ingredients in fertilizers used on farms and backyards alike). While the levels may not be considered dangerous or high to humans, it can accumulate in aquariums. Phosphates can also enter an aquarium through the salt mixes used in saltwater aquariums, in the rocks and decorations used, and in the thawed water from commercial frozen foods. Read More »

Every now and then, we find a new fish or invert that jumps its way to the top of our wish lists. My new favorites? The Roundheads aka Longfins, Marine Bettas, Prettyfins, Comets, Devilfish,  Spiny Basslets – fish from the family Plesiopsidae.

There are a few genera in this family that you may see in fish stores and aquariums. The most well-known (although still far from common) are the Assessors – the Yellow Devilfish (Assessor flavissimus) and the Blue Devilfish (Assessor macneilli). Wild-caught Assessors are still few and far between, but tankraised fish are slowly starting to become more common. Longfins, genus Plesiops are also becoming more common. The three you’re most likely to see are the Crimsontip Longfin (Plesiops coeruleolineatus), Northern Devilfish (Plesiops corallicola) and the Sharp-nosed Longfin (Plesiops oxycephalus). A few other fish from the Plesiopsidae family show up every now and then as well, like the Power’s Roundhead Grouper (Paraplesiops poweri) and the more well-known Marine Betta or Comet (Calloplesiops altivelis). Read More »

Experienced aquarists know that the vitality and vibrance of aquarium fish hinges not only on a clean environment but on the quality of the diet you provide for your fish. Flake and pellet foods have been long time aquarium dietary staples and frozen foods are popular for their nutritional value and variety, but a couple new kinds on the feeding block are gaining in popularity – gel foods and frozen “IQF” foods. Read More »

Some of the most common questions we get from customers are about the relationship between clownfish and anemones (especially after the release of a certain animated movie several years ago). Aquarists see that relationship and want to replicate it in their own aquarium, only to find that the clownfish and anemone they brought home don’t seem to want anything to do with one another. “Why is that?!”, many ask. “I thought they couldn’t live without each other!” The truth is….they can. Anemones don’t need clownfish and clownfish don’t need the anemone, especially in aquariums where (hopefully) they don’t have any predators to hide from. In the wild, the anemone’s stinging tentacles give the clownfish somewhere to hide from and the clownfish’s messy diet gives the anemones some extra food (although there have been reports of clownfish actively feeding their anemones, but that’s another blog). Read More »

When most people think about where some of their favorite aquarium fish come from, they usually think of brightly colored corals and fish darting about in the sunlight. If you ask them how fish are collected, they might picture collectors snorkelling or skin-diving to the reefs to hand-collect the fish that will soon appear in their local fish stores. But, for a large number of fish in the aquarium trade, this is just not a reality. Sure, plenty of fish come from shallow reefs close to the surface, but many also come from deep, dark reefs over 100 feet below the surface where light doesn’t penetrate and even some of the colors of the fish themselves don’t, for all practical purposes, exist. Read More »