Problem with Internal sump water level

[patgohch]

I'm running a 2ft IOS tank with internal sump + hood on the tank. Due to space constraints, my flow pump and PH (to drive the Jebo 180 Skimmer) are all in the small internal sump measuring 0.5x0.5x2ft.

Problem is I notice the water level is less than halfway in the sump, i.e. my PH for the skimmer is very near the top of the water level. Evapouration rate in my tank is quite high as I run 4 x fans 24/7. Need to top up at least 2 litre per day. If I don't top up in time, e.g. reach home late from work, then my PH would be above water level!

Need your opinions on the various options I thought of:

1) Run a more powerful PH (>3000 lt/h) for connection to both skimmer and tank flow. (But can't seem to get the veturi to work!!!)

2) Use a slower flow pump rate for the tank (PH for skimmer is the original Jebo one 1500 Lt/H), so use less than 1500 Lt/H.

I don't know if you guys understand what I'm saying...hope you do...thanks!

By the way, still cycling my tank for 2nd week....

[Hon]

From your description above, it's not the powerhead giving you problem. Its in fact the water level and evaporation problem.

When your tank water level reaches the top of the overflow box, it will overflow into it. When water evaporate, the water level in your tank remain unchange because the height of overflow compartment keeps the water level constant. Note: Evaporation will not cause your overflow box to become shorter in height. The the final water level change will only occur in your overflow box, and this explain why the ph is reaching the top of the water level during evening time.

[weileong]

time to get a auto top-up device like the TUBBY. That should solve your problem.

[patgohch]

Thanks, makes sense. I use a diy top up bottle (2 Lt) everyday...maybe not enough hor...need to top up at least 4 lt then...

By the way is this too much? cos my main tank area the water level very high leh...