AQUARIUM

Tetra Whisper heaters?

I have a 50 watt preset Tetra Whisper heater in my 10 gallon divided betta tank, and it’s supposed to keep the water at 78 degrees. Well, my thermometer is currently reading 70 degrees, which is far too cold for my poor bettas. The indicator light does come on occasionally, so I know it’s at least functional, but I’d like it to, you know, keep it at the promised temperature.

Any ideas as to what’s wrong?
I can’t adjust it–it’s preset.

Here is one that I found that might help you. It is not a preset unit. You adjust the heater to the proper water temperature that you need. Check the link below. Hope this helps you a great deal.

Tetra Whisper In-Tank

WHISPER 10 AIR PUMP (NEW DESIGN), 1 PACK, AIR PUMPS, TETRA USA INC., AQUARIUM $9.22

WHISPER 20 AIR PUMP (NEW DESIGN UL APPROVED), 1 PACK, AIR PUMPS, TETRA USA INC., $17.15

WHISPER 20 AIR PUMP (NEW DESIGN), 1 PACK, AIR PUMPS, TETRA USA INC., AQUARIUM $12.02

WHISPER 40 AIR PUMP (NEW DESIGN UL APPROVED), 1 PACK, AIR PUMPS, TETRA USA INC., $18.65

WHISPER 40 AIR PUMP (NEW DESIGN), 1 PACK, AIR PUMPS, TETRA USA INC., AQUARIUM $15.19

WHISPER 10 AIR PUMP (NEW DESIGN UL APPROVED), 1 PACK, AIR PUMPS, TETRA USA INC., $12.69

WHISPER 100 AIR PUMP (NEW DESIGN), 1 PACK, AIR PUMPS, TETRA USA INC., AQUARIUM $30.38

WHISPER 60 AIR PUMP (NEW DESIGN UL APPROVED), 1 PACK, AIR PUMPS, TETRA USA INC., $24.86

WHISPER 60 AIR PUMP (NEW DESIGN), 1 PACK, AIR PUMPS, TETRA USA INC., AQUARIUM $22.12

TETRA BIO FOAM GRID FITS WHISPER 10, 1 PACK, FILTER PADS, TETRA USA INC., AQUARI $5.13

WHISPER 100 AIR PUMP (NEW DESIGN UL APPROVED), 1 PACK, AIR PUMPS, TETRA USA INC. $34.81

TETRA BIO FOAM GRID FITS WHISPER 20, 1 PACK, FILTER PADS, TETRA USA INC., AQUARI $5.29

TETRA BIO FOAM GRID FITS WHISPER IN TANK 10, 1 PACK, FILTER PADS, TETRA USA INC. $4.63

WHISPER 1/2 IMPELLER, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., AQUARIUM $10.39

WHISPER 3/4/5-STRAINER, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., AQUARIUM $3.24

WHISPER 5 IMPELLER, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., AQUARIUM $14.20

WHISPER JUNIOR MINI E IMPELLER (FITS 10), 1 PACK, PARTS-POWER FILTERS, TETRA USA $8.69

WHISPER 3I IN-TANK POWER FILTER, 1 PACK, SUBMERSIBLE FILTERS, TETRA USA INC., AQ $15.46

TETRA IMPELLER FITS WHISPER 60/3/4, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., $10.64

EXTENSION TUBE WHISPER 60 3/4/5, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., AQ $10.51

TETRA TUBE BAG FITS WHISPER 10, 1 PACK, PARTS-POWER FILTERS, TETRA USA INC., AQU $11.97

WHISPER PF10 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $15.61

WHISPER EX70 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $54.56

WHISPER EX70 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $44.93

WHISPER 60 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $53.55

WHISPER EX30 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $34.63

WHISPER EX30 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $28.51

WHISPER 20 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $25.76

WHISPER EX45 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $39.08

WHISPER 30 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $32.20

WHISPER EX45 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $32.18

WHISPER 40 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $37.12

WHISPER EX20 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $27.70

WHISPER EX20 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $22.82

WHISPER PF10 POWER FILTER, 1 PACK, POWER FILTERS, TETRA USA INC., AQUARIUM $18.95

NEW IN BOX TETRA WHISPER AP 300 AQUARIUM AIR PUMP $29.99

TETRA WHISPER BIO-BAG 9 JUNIOR SIZE DISPOSABLE FILTER CARTRIDGE NEW BOX $1.99

TETRA WHISPER MEDIUM AQUARIUM FILTER CARTRIDGE 3 PACK $14.99

TETRA WHISPER EX45 FISH AQUARIUM POWER FILTER 240 GPH NEW 30 – 45 GALLON TANKS $26.99