2.10 ml of the same water sample was filtered in a crucible and was first dried at 105°C and then ignited at 550°C. The following data was obtained:

Weight of empty crucible + filter (g) = 18.1154
Weight of crucible + filter after the oven at 105°C (g) = 18.2491
Weight of crucible + filter after the oven at 550°C (g) = 18.2055

Calculate TSS, TDS, VTSS, FTSS, VTDS and FTDS for the sample

Where TSS == Total suspended solids
TDS == Total Dissolve Solids
VTS == Volatilize Total Solids

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activated sludge

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I have 5 aquariums. All of them have filters canisters with a biofilter that’s permanent, and a carbon filter media cartridge. I also have a small sliver of sponge and some rocks in the bottom of the canisters for room for more bacteria to grow on, since I have had times where changing filter media throws my tank back into cycling. Anyways it’s been months now and the carbon filter cartridges that I’ve been rinsing in buckets of old tank water monthly are getting really gnarly. They aren’t torn up but I think they might need to be changed. Am I doing this prematurely? Will this cause my tank to start the nitrogen cycle again or have an ammonia spike? How often should I be putting new carbon filter media cartridges in into my filter canisters?

TIA

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Ok im buying a Saltwater Setup for a FOWLR tank. so far i have bought a 55 gallon tank, Stand, Pro Clear 75 Wet/dry filtration system and it has built in protien skimmer and sump. brand new lights. I know i need to buy heaters what else do i need equipment wise. Thanks!!
oh i do have two power heads also

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This is our Research Project.Please…I need help urgently!

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