Prepare the cleaning solution in an empty slop tank or in a tank near the pump chamber. The cleaning solution is prepared with 1-3% UNITEDCHEM-TANK / PLUS. Afterwards, the solution is circulated in the tank with the aid of the heater and tank washing system. The chemical solution returns to the slop tank from the tank with the leaching cycle tube. It is usually not possible to re-circulate the solution through the tank washing heater (to keep the temperature of the solution constant) without making a temporary connection between the tank and the tank washing pump from which the chemical solution is prepared. The capacities of slop tanks, pipelines and pumps must be carefully calculated so that a sufficient volumetric amount can be achieved in the continuous circulation of the chemical solution. In addition to the amount of chemical solution, a maximum of 3 tanks are fully cleaned with a single chemical solution depending on the condition and size of the tanks to be cleaned. After the cleaning, the tanks are rinsed with fresh water or sea water and the result is taken exactly.