Submersible Heater Question

[Seiryoku]

I've got a visi-therm stealth by marineland positioned horizontaly about 1" from the gravel in my 12g eclipse. I just added a few glowlight tetras tonight to help cycle the tank (~half of the gravel in it is from a friends 6 year old tank, I also "borrowed" some of the gunk on his bio wheel) and they are all hanging out between the heater and gravel. Should I move the heater down to just above the gravel, would it be better off vertically or are the fish in no danger?

Thanks ^^)b

 

[bigredspecial]

Is there anything else in the tank? It could be that it's the only spot for them to hide.

 

[Seiryoku]

The tank is loaded with plants and decorations, lots of places to hide. The ghost shrimp also hang out under the heater when the tetras are not there. I think I'll get another thermometer just incase the one I'm using is off.

 

[turtlefish]

Is the filter on? Could be very little water movement not spreading the heat?

 

[YahooFishKeeper]

i keep my heaters all verticle (except in my cray tank) and right under the place where the water enters the tank, so it circulates. im not sure if that makes a difference though.

 

[Seiryoku]

The filter is on and makes a strong current in the tank. The glowlights found a new spot to hide in now, but still hang out on top/under the heater some times. I got another thermometer just incase the first one was off, but they are both within 1 degree of eachother. The ghost shrimp camp out under the heater some times too though.

The tank is at 78-79, depending on which thermomemter I check. Maybe they just like that spot in the tank...

 

[bigredspecial]

That's really weird... I can't honestly say I have any idea why they would do that!