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NewFishFiend 02-24-2013 10:18 PM

Heating a 75 gallon tank
 
Wondering how long it takes for water in a 75 gallon tank to heat up with a heater for up to a 100 gallon tank. We set our heater to 79 after we filled the tank up. The water was at 74 last night and is still at 74 now and the heater only comes on for a few minutes at a time. Is this normal? I figure its gotta heat up slowly but this seems too slow. Is the heater malfunctioned? Its a Pen-Plax Cascade heat

MoneyMitch 02-24-2013 10:37 PM

Quote:

Originally Posted by NewFishFiend (Post 1443937)
Wondering how long it takes for water in a 75 gallon tank to heat up with a heater for up to a 100 gallon tank. We set our heater to 79 after we filled the tank up. The water was at 74 last night and is still at 74 now and the heater only comes on for a few minutes at a time. Is this normal? I figure its gotta heat up slowly but this seems too slow. Is the heater malfunctioned? Its a Pen-Plax Cascade heat


their might be a problem with the thermostat inside the heater, is ur heater placed vertically liek up and down or horizontally left to right? do you have water movement to circulate the water around the tank? i know my hob is on one side and i have a smaller circulation pump on the other side to make sure the water is evenly heated. i use the stealth line and have trouble keeping my water cool enough.

NewFishFiend 02-24-2013 10:39 PM

Quote:

Originally Posted by MoneyMitch (Post 1443965)
their might be a problem with the thermostat inside the heater, is ur heater placed vertically liek up and down or horizontally left to right? do you have water movement to circulate the water around the tank? i know my hob is on one side and i have a smaller circulation pump on the other side to make sure the water is evenly heated. i use the stealth line and have trouble keeping my water cool enough.

Its vertical and near the HOB filter. The tank was just set up yesterday. It is a 300w heater. I'm wondering how good of a product Penn Plax makes.

AbbeysDad 02-25-2013 08:01 AM

The temperature settings on most heaters are relative but not absolute. I would increase the setting slightly, waiting several hours in between adjustments until the desired temperature is reached. My Aqueon Pro heaters are set around 80 to deliver 77F.
Also, I use two heaters in my 60g (200w and 250w) to ensure consistent operation.

Romad 02-25-2013 08:08 AM

+1 on the two heater option. I've got one at each end of my 75 gallon and it works like a charm.

ZivaD 02-25-2013 11:08 AM

Quote:

Originally Posted by Romad (Post 1444286)
+1 on the two heater option. I've got one at each end of my 75 gallon and it works like a charm.

Yep - +1
Also, what is the actual wattage rating for the heater, the "up to" guidelines can vary from company to company, so knowing the actual rating can help.

AbbeysDad 02-25-2013 01:01 PM

Quote:

Originally Posted by ZivaD (Post 1444483)
Yep - +1
Also, what is the actual wattage rating for the heater, the "up to" guidelines can vary from company to company, so knowing the actual rating can help.

The OP indicated it's a 300w heater which should be fine assuming avg room temperature. (Basically need 3-4 watts per gallon at room [72F] temperature.)

NewFishFiend 02-26-2013 03:38 AM

Well it took it awhile and i had to turn it to 86 but it finally got to 80. I ordered a marineland heater yesterday too so i will install that too when i get it
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Byron 02-26-2013 12:48 PM

Now that the tank is warm...does it need to be this high? No mention is made of fish species, and 79/80F is pretty warm for many of them.

And BTW, welcome to Tropical Fish Keeping forum.:-D

Byron.

NewFishFiend 02-26-2013 04:02 PM

Well we havent stocked it yet but the ones we know for certain will be our black neon tetras and our 2 angelfish
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