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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