HELP URGENT NEED ADVICE

[nemo8]

Dear All

Need all your kind advise what will cause my sump tank to overflow & flood my hall .

My main tank water left less than 1/4 ......luckily for the fishes but as for corals i think .......maybe half wipe out .

New set up of my 3x2x2 tank 3 months ago .

skimmer= reef octopus

chiller = arctica 1/10 pump ehiem 1260

return pump = aquabee 5000.

[FuEl]

Back siphon. Your water input into the tank must have been more than 3/4 down from the top of your tank?!. Your water return pipe needs to have a small hole drilled. Drill the hole just below your water surface. It will stop the back siphon. I am stumped on why the tank maker did not advise you on this.

[garyjg]

Fuel,

ever if he dosen't have a hole as you mentioned he still wouldn't drian his tank... sounds more like his water input is on the bottom of the tank without a safty valve(check valve) I know of one tank maker that has this crazy design.

[orsony]

Back siphon. Your water input into the tank must have been more than 3/4 down from the top of your tank?!. Your water return pipe needs to have a small hole drilled. Drill the hole just below your water surface. It will stop the back siphon. I am stumped on why the tank maker did not advise you on this.

Better to drill at least 2 holes. Just in case one of the hole is blocked.

[nemo8]

Bought my tank during aquarama 09 marine tank competition & i believe the hole has been drill .

[FuEl]

I believe a tank photograph will speak a thousand words. It's hard to guess what the problem is without looking at the pipework.

[stevenkoh08]

i think his overflow compartment is only one layer only ours have two layer which is the outer layer got the bottom in and top is flow down and the secound layer only top in

[nemo8]

thanks for all your inputs & time. will try to post some pictures later . still busy doing the cleaning up .

Tank was from QianHu during the aquarama marine competition 09 .

[nemo8]

Dear All

If there is a short circuit at home , any chance that there will be a back siphon from my return pipe chiller to the sump tank that causes my sump tank to overflow . As far i know that is the only return pipe goes deep in my main tank near to the sand bed.

[orsony]

Dear All

If there is a short circuit at home , any chance that there will be a back siphon from my return pipe chiller to the sump tank that causes my sump tank to overflow . As far i know that is the only return pipe goes deep in my main tank near to the sand bed.

Bro, you might need to change the sump tank. I think the height is not that safe when there is a return from the main tank if you off the pump. Can you take a pic of the return pipe and out flow pipe in your main tank? Somehing is not that right in the main tank because the water is too low.

[stevenkoh08]

Dear All

If there is a short circuit at home , any chance that there will be a back siphon from my return pipe chiller to the sump tank that causes my sump tank to overflow . As far i know that is the only return pipe goes deep in my main tank near to the sand bed.

u mean the pipe go from the top to the bottom of ur tank it sure to be siphon eveytime u off ur pump it'll have a pull untill the pipe hole touches no water at it tip better redesign ur return nothing to do with the sump tank make it like all other bro spraying on the top not so deep into the tank

can't belive it qain hu have such design for a tank no matter it marine or fresh water

[nemo8]

u mean the pipe go from the top to the bottom of ur tank it sure to be siphon eveytime u off ur pump it'll have a pull untill the pipe hole touches no water at it tip better redesign ur return nothing to do with the sump tank make it like all other bro spraying on the top not so deep into the tank

can't belive it qain hu have such design for a tank no matter it marine or fresh water

Have wrote to QianHu with regards to the capabilities of the cabinet due to the overflow that has wet the bottom cabinet .

Leon from QianHu called me after an hour said that it will not affect the capabilities of the cabinet for the next 5 years .

After some discussions , we believe that due to power failure the return pipe from the chiller in the main tank back siphon the water into the sump tank that is likely to cause the overflow of the sump tank .

Lesson learned , will put the return pipe from the chiller back to the sump tank instead of the main tank .

I believe there is nothing wrong with the design of the sump & the piping .

Anyway great customer service again from QianHu Leon .

Many thanks to all inputs again .

Tread closed .

[stevenkoh08]

oh now i got it so it the chiller pipe that u inserted to the main tank is too deep in the main tank seen the problem is slove sound good happy reefing

(And to state my comment for the earlier statement there's a communication break down so i got a wrong info for the return pipe in nither the qain hu fault so to be true i apologise for what i've said)