Herbie Questions

[Madreefer]

Yep I have good quality gate valves and a ATO so my water level in my sump does not fluctuate.
My 2 syphon drains in the overflow are cut approximetly 6" below the 2 emergency drains and I like to keep the water in the overflow 3-4" above those. So no there is no trickle of water in the emergency drains (don't like the sound and don't trust it as i've had the tank overflow when I was not home so I had a really pi$$ed off wife)
Is there a chance it could be a problem with my return pump?
I've also just recently started using a filter sock again and I have noticed that as the sock gets dirty and does'nt allow water to flow out of it as fast it also has an influence on water in the overflow of tank.

[Madreefer]

bump???

[Myka]

I've found the best way to do it, considering your 4 drains is to have the gated drains cut low (like you have), then have the two emergency lines cut one 1" taller than the other. Put a 45 degree elbow on the top of the shorter one (make sure it's 1" shorter including the 45) and have a trickle going down the shorter one. The 45 keeps it much quieter and you're able to get a smaller trickle. I still end up adjusting mine every once in awhile, but not often.

[Madreefer]

Yea I don't think that's not gonna work for me. The emergency drains are glued in and I won't be able to cut them down. Do you think not having a trickle in to the emergency drains may be the issue? I have tried it both ways and still have to adjust on a regular basis

[Myka]

Originally Posted by Madreefer

Yea I don't think that's not gonna work for me. The emergency drains are glued in and I won't be able to cut them down. Do you think not having a trickle in to the emergency drains may be the issue? I have tried it both ways and still have to adjust on a regular basis

IME it stays aligned for longer when there is a trickle in the emergency. You could use a roto zippy tool (Dremel) to cut the pipe from inside by going through the top. If you decide you don't like that, you can put a connector fitting on the end and it will be pretty much the same height it used to be.

[don.ald]

I have a tank where I constantly have to adjust as well. When I use the trickle into the Emergency drain method its not long before it starts to trickle faster, then I have to adjust again. I also have a gate valve and all that...tried adjusting the return flow as well. Tried drain line submerged and above also. Noise isn't an issue for me so I just opened it up and let it rip.

[Madreefer]

Originally Posted by don.ald

I have a tank where I constantly have to adjust as well. When I use the trickle into the Emergency drain method its not long before it starts to trickle faster, then I have to adjust again. I also have a gate valve and all that...tried adjusting the return flow as well. Tried drain line submerged and above also. Noise isn't an issue for me so I just opened it up and let it rip.

You've got your gate valves wide open?
And your return pump wide open?
I'm trying to have a slower flow in the sump for better skimming. But it's prolly not necessary as my skimmers no slump.

And Myka I thought bout your idea and may give it a go. It's just a pain in the a$$ to work on my tank. The top stands 6' high and its 30" wide. And of course up against a wall

[Myka]

Originally Posted by Madreefer

And Myka I thought bout your idea and may give it a go. It's just a pain in the a$$ to work on my tank. The top stands 6' high and its 30" wide. And of course up against a wall

Oh, fun stuff! Good luck!

I know from experience that having a gate valve on only one drain works a lot better than having it on two drains. I don't know why - probabaly some law of physics.

[kien]

If it makes you feel any better (probably not), my tank is is 6 years old and the same herbie setup since day one, and I have to adjust mine from time to time. Maybe not every week, but periodically. In some cases I do know what causes the variability, and in some cases I don't. Here are the causes that I know for certain changes the flowrate and overflow water level:

1. gummed up overflow weir. Left too long and it gets gunk or algae in it which restricts the flow. Algae detaches from it on its own and it will GUSH. Sometimes feedings get trapped in the gummed up overflow weir (algae trap).

2. Something gummed up in the gate valve. See #1 above

3. Using a filter sock. It does strange things to the flow and fluid dynamics.

4. Dynamic changes in skimmer water level. My skimmer is on its own set of mystery parameters where by it will occasionally change water level which in turn affects the entire flow and fluid dynamics of the entire tank.

[FishyFishy!]

I have the same issue. Probably once a month or so. Same goes with my skimmer etc. Everything always seems consistent, but im still adjusting from time to time. I use the emergency trickle as well. I find that works the best, and adds a little bit of surface skimming to boot.

I think kien is onto it. Little changes in where the water flows I think is the cause. Could be small, unoticable things. Thats what im thinking anyways.

I also have a theory that because I drip my kalk into my return chamber, that the pumps change their GPH over time as they get gummed up. Ive been vinegar bathing my return pumps more often in my maintenance routine, and that has really helped. Havent touched my valves in a while now.