Congratulations on the tank. Lil has given you some great advice. Since you have shrimp, here's a quote from a shrimp breeder which might interest you. The subject was shrimp death. After sudden deaths, I quit using hot tap water and didn't have any more problems.
"You used the hot water tap to fill your tank
Many people use the hot water tank to regulate the temperature of the tap water when making water changes during the colder months of the year. Shortly after the water change your shrimp start dying one by one.
Suggestion: *Never* use the hot water tap. The hot water has increased levels of copper, lead and possibly other heavy metals toxic to shrimp. Due to certain chemicals added to the hot water, the copper pipes corrode more easily and release copper directly into the water. Other chemicals are also added to the boiler which, helped by the temperature of the water, release heavy metals into the water. Whereas fish will be fine (in the short term anyway), shrimp will react adversely immediately."