Heatrers

[kizno1]

how much could a 75w heater do coz some say 75l and others say 150l
and how much could a 100w heater coz some say 100l and others say 200l

 

[Davo86]

how much could a 75w heater do coz some say 75l and others say 150l
and how much could a 100w heater coz some say 100l and others say 200l

Depends on the brand really, but most will be equivalent to 1W to 1L
so a 75W in most cases will only be enough for a 75Litre tank

 

[kizno1]

what brands are good but not to expensive

 

[jonny_dw]

I use a 100w heater in a 120 litre tank, wouldnt use it for much more.

 

[indigoj]

I use a 300w and a 150w to heat my 6ft (approx 650l filled volume) tank to 25deg C

A lot depends on ambient temperature, insulation behind/above the tank, temperature you want to maintain etc.

As a rule 100w = 100l