The manufacturer informs:

Extremely concentrated bacterial activator (about 15 times more than normal activators on the market) for an ultra-rapid start-up of marine and brackish aquaria; perfect in cases of overcrowding of the aquarium or restoration of the bacterial flora after a collapse. Its use is also indicated following the relocation or modification of the roach as well as, more generally, following maintenance operations such as cleaning the substrate or filter material.

• super-concentrated suspension of non-pathogenic bacteria, specifically formulated to very quickly establish bacterial flora in newly started aquaria
• very useful in emergencies requiring rapid restoration of the nitrifying capacity of biological material
• particularly suitable in overcrowded aquaria or when new specimens are added to the tank
• useful when restoring the bacterial load following major maintenance or modification of the rock or substrate
• ultra-rapid reduction of ammonia to nitrite

MicrōBacter Start XLM creates a nitrifying biological filter in marine and brackish aquaria of all types and is particularly useful in newly started aquaria that can be 'ready' in about 5-7 days in most cases. It rapidly removes ammonia and nitrite in a natural way through non-pathogenic nitrifying bacterial action.
Although it is a extremely powerful product, can be overdosed up to 5 times more than the nominal value in an emergency.