SuperColey1;56936 said:Cheap 79p one from the local discount hardware store.
The glass type with the little balls in the bottom end. (Same as the £2.50 Hagen Marina ones )
Accuracy isn't that important. A degree above or below is not going to make any difference to the inhabitants. A few degrees maybe.
SuperColey1;56961 said:Ok here are the 2 together.
The one on the left is the standard one which is repackaged by all the companies and sold as their own. Cost from the Supermarket was actually 99p and not 79p as stated before. These are the same as the Hagen Marina ones.
Next to it is the crystal ADA style one which was £3.50 off ebay.
If they were both in the tank for any length they both read the same temperature at nearly 26C but the large one has been out of the tank for a while and therefore when replaced is reading lower as it hasn't got up to temp yet. Therefore I would suggest they are both accurate.
However the little one does look better and surprisingly is much easier to read. I also like the blue in comparison to the red. If you right click on the picture and then select open image you can see it a little cleare and the difference really shows in 'readability'.
SuperColey1;56983 said:Well mine is never yellowish and pretty clear anyway but Purigen plus 50% weekly water changes pushes it to a little clearer. Plus 5500K pure white lights.
I wouldn't worry about accuracy too much. 99% of thermometers are going to be accurate to within 1 degree C which is easily accurate enough for our purposes.
SuperColey1;57066 said:More O IME makes the water clearer
I wouldn't think reducing the lighting would make a difference to water clarity unless you were getting algae spores in the water column and now the lower light is meaning the plants are now outcompeting.