Lobsters are more susceptible to abrupt and lethal changes in water quality in small confined holding tanks than they would be in nature. Hazards associated with lobster ailments are particularly problematic in closed systems due to lack of "flushing." This does not mean that holding lobsters in recirculating aquaria is difficult. Such lobster husbandry simply requires a bit of care and vigilance.

Under holding conditions it is critical to closely monitor water quality conditions such as salinity, temperature, pH, and oxygen levels. It is also important to avoid overcrowding because high lobster densities can exacerbate other problems. In addition, always avoid the use of toxins in the vicinity of lobster tanks. Dangerous products include:

• Pesticides — especially insecticides including "no-pest strips." Lobsters have some similar systems for internal body functions because they are phylogenetically (from an evolutionary standpoint) related to insects.
• Cleaning Fluids — including detergents and disinfectants. There are a host of "safe" products and cleaning agents you may want to use instead of those typically advertised. For example, a mixture of vinegar and water is an effective glass cleaner and baking soda works as an excellent mild abrasive.
• Hand lotions — if you use gloved hands in the tank, then you won’t have to worry too much about contaminating your tank with hand lotion or other skin care products.
• Chlorine — be sure to eliminate the chlorine from the system if using tap water to make artificial sea water.
• Heavy metals — such as cadmium, copper, and mercury. Avoid bronze, brass, or copper plumbing materials.
• Crude oil, oil dispersing agents, and creosote. And
• Toxic construction materials — Avoid construction projects near unprotected tanks and take care in the materials you use to build your tanks. Although tanks made of glass and aluminum or stainless steel are attractive and safe, they are often expensive.

Various grades of wood (from pine planks to plywood) are commonly used if displaying the animals is not of paramount importance. Treated lumber should be avoided. Concrete or cinderblock tanks present reasonable options.

Coating wooden or cement tanks with fiberglass or epoxy resin can prolong the life of aquaria and makes them easier to clean. It also allows for rounding off corners — which can help to enhance water circulation and prevent the build up of debris in corners.

New plastic, fiberglass, cement and wooden aquaria should be allowed to cure for several days — then the water changed — before introducing lobsters into the system.