Marine Depot

Due to vacations, other recreational activities and lack of time, our tanks may no longer look their best. When this happens we generally notice that a lot has happened to the tank that needs improving. Algae may be a little thicker, the water may not be as clear and the corals may not be as […]

Metal halide lamps are now available in a wide variety of wattages as well as color temperatures. Wattage determines how much light is produced, with higher wattage bulbs producing more total light. However, the amount of light produced is not in a direct 1:1 ratio with the wattage. That is, a 1000-watt bulb does not […]

It has long been recommended that ozone be used in marine tanks for many reasons including its ability to kill many pathogens and make the water crystal clear. Ozone (O3), which is an unstable form of oxygen, acts by oxidizing with (giving up an oxygen molecule to) anything that it comes in contact with. In […]

Unlike most other topics in the hobby, lighting remains a very controversial and often misunderstood subject. This is because there are so many good options available to light a reef tank, and how a tank is lit depends not only on its size, but also what is going to be kept in it. It is […]

In order to ascertain how a reef tank is doing it is necessary to do water testing. Unfortunately the testing aspect of maintaining a marine aquarium is often overlooked. This may be due to fear of complicated tests or that a degree in chemistry is necessary in order to do a proper test. Fortunately, testing […]

The landscape of a reef aquarium is not merely one to engage the senses, although aesthetic function is certainly important to the tank keeper. Aquascaping in reef aquaria is primarily based around the structure of live rock and often sand substrate. In the past, it was suggested that up to 2 pounds of live rock […]

One of my favorite authors used to quote the old adage ‘there are 37 different ways to skin a cat’. In the reef keeping hobby this adage is axiomatic. Given that every single tank is slightly different from any other in methodology used, in how each develops biologically, chemically, and physically, that adage is an […]

The topic of water changes for a saltwater aquarium is still a topic that generates a great deal of debate. Part of this is due no doubt to wishful thinking, part due to claims by some hobbyists that they have never done a water change and part due to there being no hard and fast […]