I played with my new sump a bit yesterday, and I got my bubble problem under control. Didn't mention it, but I was getting lots of bubbles swept back into the display tank, I guess that's the price you pay to run 500 gal/hour through a 10 gallon sump (which of course is probably holding closer to 7 gallons...) I already had things very well baffled but too much flow for such a short tank. I stuffed a bunch of bio-balls into the first bubble riser area to breakup the flow a bit and allow the larger bubbles to collect and rise, and then in the second bubble riser area I stuffed some corse filter padding, and some bio-balls over it; this takes care of the last bit of bubbles. Now I only get a very few
micro bubbles back into the tank, not enough to bother me.
As far as the noise goes, I can't seem to make it much better. If I put the hose into the water I get lots of air exploding up out of the water from the hose. The air coming up in such a violent fashion causes the water to splash and make lots of noise. Lots of air is getting sucked down my overflow through the hose. Which BTW has to go more or less horizontal for a while to get to the sump. Actually, from the barb fitting, the hose curves down, back up, and then finally back down into the sump, probably causing some of my "trapped air" problem. Anyway, I have the hose pouring right at the top of the water so it doesn't fall very far but still allows the air to escape. So far this is the best position from a flow and noise stand point. Frankly it wouldn't be so bad if my sump was enclosed, but as it is sitting right out in my living room next to the tank... Next time I will think ahead and get a stand that I can put a sump under.
Good news is I can hear the fan I put on the tank to cool it down. **** it runs hot now! Keeping the A/C on in the house so it stays near a constant 75 degrees + a fan on the sump is required just to keep the tank at 82. Someone here mentioned that the Velocity series of pumps runs hot and I think they are right. Other than that I think the pump is great.

Perhaps if I could get a bit of air circulation around that pump maybe that would help...
And now I am dossing kalk...my new top-off system works great! I've got a 5 gallon Rubbermaid, with a small Mag pump inside to pump top-off via hose to my sump. The pump is controlled via a
Ultralife float switch in the sump outlet chamber. Each top-off run only goes for a few seconds putting an estimated 1/75th of a gallon (5"x5"x1/8" if you want to check my math

), in per run. I guestimate that somewhere about 1/2 gallon goes in per day (haven't really done the numbers yet).
Question: I should be getting that 1/2 inch of white water (with the rest all clear) on the bottom of my top-off container, right?
And the best news--the tank looks great! (And that's all it is really about anyway, right?)
- Steve
PS And if you got this far, thanks for bearing with my long-winded ramblings...
