Originally Posted by fbm
How many times have you seen, HELP I BROKE MY HYDROMETER--will this hurt my aquarium? They are very fragile and I broke one just from it floating in the water and hitting the side of the aquarium. This is one area where you get what you pay for. Sure you don't need one, you also don't need to to do water changes, you also don't need to use ro/di water, you also don't need a skimmer and on and on and on....
You are blowing this way out of proportion. A crappy skimmer will never pull out as much as a good skimmer, not doing water changes can hurt your water quality, and tap water should never be used. A floating glass hydrometer will measure specific gravity correctly if used properly.
If you are stupid enough to float a hydrometer in your tank, then it can get broken. A person with common sense or a little experience would fill up a tall, slim container with tank water (a slender flower vase works very well) and then test the water. Why would you ever measure the specific gravity in the tank? You should check the water you are using for a water change before it goes in your tank, not after. If the water going into the tank is at the correct specific gravity and the water in the tank is at the correct specific gravity then you will never have a problem (unless you have an auto top off unit).
If you do happen to break it, you can simply use your mag float or any magnet to pick up the pellets. No harm will come to your aquarium.