[marcus hopkins]

lol
I know where you are coming from matt I am admin on another forum so know how to treat them
I am only sharing what could be my resolution to my personal problem, but it may prove a valuable solution for others too.

[karygate]

my aquarium heater has been in overnight and the tank has not frozen but it is cool. it is a 300w one and my tank is 400 litres. worth every penny.

[matt]

my 2 were despatched today

so next week they should be here

[d.ward]

can you just throw them in the tank overnight then take them out in the morning ?

[gewindows]

Yes but leave it for 2 minutes after you turn it off to allow it to cool down.

[d.ward]

The garden centre near me should have some - dont want to order anything on the internet because of delivery times. Would i be able to work all day with that matt?

[gewindows]

Depends what temp you can get your water up to.

Basically all fishtank heaters will get water up to about 30C or so. The wattage of the heater simply affects how quickly this occurs. Overnight my 300W heater (300W is about max for domestic fishtank) got my tank up to 24+, at dinnertime this had cooled to 16+ but I had NO probs re: icing up of hose or pole.

Im getting a 3KW tank heater this week, hoping to get the temp upto about 45-50 once I have that 

[Jeff Brimble]

Could I suggest that 35-40 is warm enogh in this weather.

[gewindows]

You certainly can jeff 

Once its out the pole though it'll be 30 surely if heated to 45?

[Jeff Brimble]

Starting with 35 degrees I lose 10 degrees throgh a 30m length of algarde microbore 1/4"

[gewindows]

Cheers Jeff, Ill bear that in mind.

[Nathanael Jones]

I've just put a 2nd 500W aquarium heater in my static tank,.. my plan is to fill the van last thing at night and the tank of hot water will keep the van frost free overnight.

[Jeff Brimble]

The Victorians kept ice in underground ice houses from winter right through the summer, heat is not that much different, go for it.
Go for it 

[gewindows]

I've just put a 2nd 500W aquarium heater in my static tank,.. my plan is to fill the van last thing at night and the tank of hot water will keep the van frost free overnight.

What temp does your water get up to with a 500W heater?

[Jeff Brimble]

How about your own thermal borehole supply. Not good with a DI or Ro because of the tds, but you could use it as a resevoir to pre heat your tank through a pipe system !
Ill get ma coat.

[gewindows]

Jeff what setup have you got to heat your water?

[Nathanael Jones]

I've just put a 2nd 500W aquarium heater in my static tank,.. my plan is to fill the van last thing at night and the tank of hot water will keep the van frost free overnight.

What temp does your water get up to with a 500W heater?

Its a 1000 litre tank and its not insulated, so not very hot,.. barely lukewarm to be honest. 2 heaters should do the trick though. Tonight is the first night with 2 heaters so we'll soon see.

[JSMC]

which ones been bought by most of ye so far?

[matt]

which ones been bought by most of ye so far?

a link is on this thread at the start, its from ebay

[suds window service]

matt would two 300watt aquarium heaters warm up my 400 litre tank and how long would you leave them on?
i was looking at them today in pets at home £21.99 each