![]() ![]() If the CO2 is dialed in, this might not be worthwhile, but might be. Needle wheel and then post reactor, then back to the return pump might also help. Most of the mech filtration will clog and back up the flow in the sump, as long as the glass slats are a little lower than the sump, then the water can by pass if you forget to clean.Ĥ. Generally a stand from the bottom coming up with adjustable legs to match the height of the water level is a good idea, the top is often eggcrate notched out to support the bag filter ring size. Setting up a stand to hold the bag filters are the right height for each pipe is key. This produces minimal splashing, it also produces minimal head pressure, so a small amount of blockage in the bag filter causes more by pass. You put them just above the water level in the 1st stage of the sump. The trick there is similar to the overflow. They make the poly nets that are pretty fine, say 300 micron, these can be used or the felt larger micron ratings. Good for polishing if you disturb things. Bag filters can be used by need cleaned often. Lava does not clog really, sponge will eventually(months).ģ. Generally 20 ppi is good for planted tanks. A sponge prefilter can be added at the prefilter over flow stage, you'd need to provide enough room and likely invert the drain pipes.Ģ. Mike, since you are okay with DIY, you can make improvements, if you so chose.ġ. Also, did you make any calculations on the overflow box length or did you just pick a length and then get a pump big enough to put enough water over the full 4 foot length? How "deep" is the water flowing over the weir? Was there any reason why you have the holes at mid overflow level vs down near the bottom of the overflow? What kind of a drop over the internal box do you have? It looks like a couple of inches. ![]() It looks like your tank was originally drilled for 1-1.5 inch bulkheads. ![]() I'm looking to redo the overflow on my 125 so I have a few more questions if you don't mind. Unless the weir gets clogged teeth or there's an obstruction, my emergency pipe never sees any water flowing through it though. I'm probably only throwing 700 GPH at best so this may also be a factor with my 1 inch lines. My main line is basically the bulkhead fitting without any standpipe. However my current setup is more of a vertical standpipe and doesn't use the down turned 90 or T fitting so that may help purge the air faster. I found this behavior was less of an issue with the valve at the bottom of the pipe in the sump. I was curious where your valve was as I had similar issues with the herbie I'm using. I noticed how high the water got when you started your pump before it settled down. ![]()
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