Our old aquarium had 5 sides (kinda like a square with one of the corners cut off), 55 gallons. It sprung a leak where the glass is seamed together with glue. It was a very small leak, probably about a gallon per hour if that.
No matter what there is going to be water on the floor...
When it started leaking the first time, I noticed it about an hour or so later.
but if it started leaking at say 11 pm when everyone was in bed, there would be about 8-10 gallons on the floor before anyone would wake up.
Whereas with the alarm, there would be alot less water on the floor.
The new one is a bowfront aquairum, not sure on the gallons....hopefully it wont leak, but I'd like to have the alarm just to be safe.
So is there an easier way to send the textmessage?
I agree with JOEL points... You should first analyse why the tank is leaking ? instead of trying to put an alarm. Instead of glue, get a rubberised sealent from the hardware shope. There are sealant which can stop leakage of concrete. And the leak comes only through the joints, so it wont look bad if you apply the sealant on that corner.
Putting a personal alarm is only a second option which is merely useless , because there are two reason
1. If you put the water level sensor very accurately , it will get trigger if the fish create any water waves( which happen always)
2. If you place the sensor in tolerance, water will be on the floor till your sensor sense the level, and sending the message to your mobile. (Delay of the electronic system, delay of the pc to communicate with the service provider, latency in the communication link. Some time the message come very late by the time you can see your tank is empty..!!!!!)
So once again i advice you to apply a permanent solution. If still you wish to make an electronic system to generate the message , i have a better solution....
You can put a dedicated GSM modem along with the controller in the fish tank side. You can interface the level sensor to this controller. Get a CUG scheme SIM card for this modem so you need not spend money for the operation, you may have to pay a reasonable monthly rental. Because it does not use any voice call.
Here you don't need a PC also. Modem can directly send the message to your personal mobile.
If you need assistance in this , i can guide you make one...