sponge. 1. a porous, absorbent mass, as a pad of gauze or cotton surrounded by gauze. 2. the elastic fibrous skeleton of certain species of marine animals. absorbable gelatin sponge a sterile, absorbable, water-insoluble, gelatin-base material, used as a local hemostatic. (spÅ­nj).
The water heater is the first place to start when there is no hot water in the shower. A shower should be counted on to be good and hot when you need it to be. But keep in mind that the hot water coming from a shower is coming from your hot water heater tank.etermine if the problem is whole-house related or just affecting the shower. Turn on every hot water faucet and check the temperature of the hot water. If they all start out hot but cool quickly, a burner in the water heater may be the cause. If they never get hot, a faulty dip tube may be the problem.
Protecting the Hot Tub From Water Impurities. 1  1. Measure the calcium hardness of your water when cool. 2  2. Add hardness increaser to low calcium water. 3  3. Remove hard water if too much calcium is present.  4. Add soft water to balance calcium 1  hardness. 5. Adjust pH and total alkalinity.  6. Adjust the calcium hardness of your water when cool.