Finally joining the club

  • We are currently upgrading MFK. thanks! -neo
I am wondering, why the closed loop on the inflow? Wouldn't having them split into two equal lengths work better, or I am missing the idea that water will equally pressure itself in the closed loop? Also curious as to why the pump before the canister? Wouldn't it work better pull the water through from the sump and then pushing into the tank? Don't get me wrong here, I'm just trying to understand how this all fits together.

I also got bored and redrew your original plumbing with the changes I am asking about.

plumbing.jpg
 
Lusus_Naturae said:
I am wondering, why the closed loop on the inflow? Wouldn't having them split into two equal lengths work better, or I am missing the idea that water will equally pressure itself in the closed loop? Also curious as to why the pump before the canister? Wouldn't it work better pull the water through from the sump and then pushing into the tank? Don't get me wrong here, I'm just trying to understand how this all fits together.

I also got bored and redrew your original plumbing with the changes I am asking about.
Click to expand...
i like that better
 
If your 150 is as Old as my 7x2x16" 135 Oceanic it probably has the old blue silicone and you are going to have to reseal it. Especially if it has been sitting empty in storage for 15 years.
 
I believe that most external pumps are designed to push water, not pull it. Be sure to read the instructions for the pump you are using. I know that restricting the intake for Reeflo pumps is a no-no (meaning you would want to setup the pump before the canister)...not sure what kind of pump you are using.

+1 on resealing. I personally would not be comfortable with 15+ year old silicone.
 
Silicone is clear, and 'looks' good, of course I will do an empty water run first. Would you recommend a complete tear-down or simply cut the old silicone out of the corners and apply a new bead there? I know old silicone doesn't stick to new, but with the water pressure forcing the silicone into the corner it should be good, right?

I was thinking the canister after the pump for two reasons- one, I would have to prime the canister first filling it completely with water; two, impeller pumps suck at 'sucking'. Cavitation in the impeller chamber can occur with too much negative force on the input side, possibly causing damage.

I was thinking the same thing about the inflow, i would think that I would get equal output on all four sprays, but I may just keep them separate like in your revision.
 
Good to know. I haven't messed with an external pump at all so knowing the how's and why's is nice. I would take some time and redo all the silicone and cure it out for a week, I wouldn't want that tank leaking.
 
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