3155 issue

spjeff69 · 07/18/2016, 06:58 PM

After not using my 3155 for several months (sold my old tank) I hooked it up to a new tank.

I've had an issue twice within the last week where the water level rises past the optical sensor and continues until the float switch rises.

Not sure what to do.

rvitko · 07/19/2016, 08:32 AM

The most probable causes are-

1) Microbubbles sticking to the sensor, the sensor only detects air vs water, if the water stops exactly at the float, this is the most likely culprit. Rinse the sensor well and make sure it is clean and free of any algae or mineral deposits, use only vinegar (minerals, coralline algae) or detergent and water (algae and general "dirt") and a soft towel.

2) A siphon, if the water level stops randomly and may be past the float and the problem is worse when the reservoir is full, this is the main culprit. The hose terminus must be above the water level in the reservoir, if the reservoir has 18" of water, where ever the hose ends it must also be at least 18" high, otherwise the difference will be able to siphon in.

07/18/2016, 06:58 PM	#1
spjeff69 Registered Member Join Date: Feb 2005 Posts: 353	3155 issue After not using my 3155 for several months (sold my old tank) I hooked it up to a new tank. I've had an issue twice within the last week where the water level rises past the optical sensor and continues until the float switch rises. Not sure what to do. __________________ Computer Repair in Clarksville, TN http://ClarksvillePCRepair.com

07/19/2016, 08:32 AM	#2
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	The most probable causes are- 1) Microbubbles sticking to the sensor, the sensor only detects air vs water, if the water stops exactly at the float, this is the most likely culprit. Rinse the sensor well and make sure it is clean and free of any algae or mineral deposits, use only vinegar (minerals, coralline algae) or detergent and water (algae and general "dirt") and a soft towel. 2) A siphon, if the water level stops randomly and may be past the float and the problem is worse when the reservoir is full, this is the main culprit. The hose terminus must be above the water level in the reservoir, if the reservoir has 18" of water, where ever the hose ends it must also be at least 18" high, otherwise the difference will be able to siphon in. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish