HOB vs canister - The Planted Tank Forum
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post #1 of 32 (permalink) Old 10-08-2011, 09:35 AM Thread Starter
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HOB vs canister

Ok so I have a planted 60 gal with a fluval 305 and an emperor 400. I want to get rid of the emoeror because of the surface agitaion witch leads to the loss of Co2 for my plants, Im thinking of a marineland magnum canister or something to replace it, any suggestions?
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post #2 of 32 (permalink) Old 10-08-2011, 09:45 AM
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Fluvals are good canisters for the price. Eiehm is a little pricier. Both are nice. you would just have to find one rated for a 60g.

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post #3 of 32 (permalink) Old 10-08-2011, 11:56 AM
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Hi Krib
I have 2 hob filters and I totally get what your saying about the surface agitation. Ive also considered the canister filters but each time I did I remembered back in the day when I had one and what a pita they are to prime and clean out. Before buying one I would check and see what your co2 is like with the hob filters. I just bought a drop checker this past week and if the hob make a big difference in the co2 I would then consider a canister filter. If it doesnt make a big difference it wouldnt be worth all the hassle for me. Plus with a hob filter it helps with surface scum.
Please keep us updated because Im right where you are.
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post #4 of 32 (permalink) Old 10-08-2011, 12:52 PM
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Is there a particular reason the Fluval 305 is not enough to handle the tank itself?
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post #5 of 32 (permalink) Old 10-08-2011, 03:31 PM
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surface agitation if u read further through here and stay current is positive for planted tanks. oxygen is just as important as c02 for plants the life of fauna and your beneficial bacteria.. its easy to add more c02 and the benefits of good surface agitation are outweighed by the cost of c02

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post #6 of 32 (permalink) Old 10-08-2011, 06:24 PM Thread Starter
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Well another reason I want to get another canister is that the HOB is really loud and without it my tank would be totally silent, seeing as i keep it in my bedroom. Fluval 305s are really not quite there when it comes to filtering 60 gallons and I always like to have two filters running so that when I clean one or if one has a problem I have one still on the tank. As for surface agitation being a help to plants because they need oxygen, correct me if im wrong here but plants produce oxygen during the daytime and co2 at night and I turn on an airpump at night. So im pretty sure surface agitaition would only be good at night.
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post #7 of 32 (permalink) Old 10-08-2011, 07:25 PM
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CORRECT!. however.. beneficial bacteria are just as important and.. they still need oxygen during the day or they will reduce the levels your fish are getting

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post #8 of 32 (permalink) Old 10-08-2011, 07:47 PM Thread Starter
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my plants are constanly pearling so that should be enough?
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post #9 of 32 (permalink) Old 10-08-2011, 08:16 PM
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should..
how is ur circulation? lower circulation increases pearling? while higher circulation dissolves the o2 in the water column more regularly. my plants look like bubble stalks if i turn my koralia off..

ur probably ok with oxygen levels but i play it safe, and there are many here who have been around a while and would totally agree with what im saying. it doesn't mean im right and if you have positive results then, by all means please stick with what u are doing

just don't be afraid of surface agitation. it is beneficial, it does help keep surface film down as well

as for cannister, sunsun makes a great one on ebay for a really good price. i have one myself and think its great. very quiet

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post #10 of 32 (permalink) Old 10-08-2011, 09:21 PM
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If you have co2 with absolutely no surface agitation it can cause low oxygen level.
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post #11 of 32 (permalink) Old 10-09-2011, 01:37 AM Thread Starter
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well i could easily run a small amount of oxygen into the tank during the day
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post #12 of 32 (permalink) Old 10-09-2011, 01:46 AM
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FYI... bubble stones don't increase oxygen by the bubbles. they don't dissolve well and they rise very fast... the agitation they cause at the surface is where u get it

it all has to do with pressure

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post #13 of 32 (permalink) Old 10-09-2011, 01:57 AM Thread Starter
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Doesnt sound intirley true to me, if the oxygen is desolving into the tank by coming into contact with the air at the surface i dont see how it makes a difference when its coming in the form of bubbles into the tank.
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post #14 of 32 (permalink) Old 10-09-2011, 02:00 AM
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I not a firm beleiver in that theory either. I agree that surface agitation is best because it serves more than one purpose. BUT, the bubbles breaking at the surface is in fact surface agitation AND, if an air stone doesnt dissolve O2 into the water then how come a diffuser will dissolve Co2 into the water?

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post #15 of 32 (permalink) Old 10-09-2011, 02:42 AM Thread Starter
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I agree that surface agitation is the BEST way to intro duce oxygen Im just saying its not the ONLY way to introduce it. And Chad has a great point about the co2
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