Mikaila31 (i hope you read this curiousity)
i'm going to assume my tank at home (without water changes in more months than i can count)
is going to have a TDS that is through the roof (measurably anyway)
you mentioned your tap water is about ...
Originally Posted by Mikaila31
The water is clear. Now stat breakdown for this tank as of today is:
kH = 8-9d
NO3 = 0ppm
GH = 15-16d
pH = 7.8
TDS = 529ppm
My tap water that I use to top this tank up has the following stats:
kH = 4d
N03 = 0-5ppm
GH = 6d
pH = 7.8 - 8.0
TDS = 130ppm
Now these are truthfully what you should expect from a lack of water changes. KH and GH will usually be the first to increase. Its not hard to keep nitrates at zero even without filtration, especially when a tank is designed to do so. One degree hardness is equal to 17.8ppm, calculating that out on the heavy side of those numbers you can account for a 267ppm increase on the TDS. Yet the tank has a 399ppm increase in TDS over the tap. There is 132ppm increase unaccounted for, which goes beyond anything I can test for. This tank is not sustaining itself, that is what this is staying, there is build up and it will keep building up.
... so i'm sure my tank is far higher than your "dirty" tank
if i can get the numbers down through massive plant overgrowth (it's an idea, a place to start)
things will reach an equalibrium if this is even feasable.
what set of numbers would you consider to be "soft" or even "managable".
i'm sure the lower the number the hard it will be to keep it there as equilibrium and homeo-stasis set in. i have seen the tank maintain a low pH that faught every attempt i made to raise it (till i did a massive trim on plants, then things went in the opposite direction and i'm sure a pH similar to what beaslbob mentions, over 8.
right now my tank is 7.0, but only because of a regular pH buffer i'm adding, this one isn't my "self-sustaining" one, more of an experiment your free to yell at me for being careless with my fish)
but i'm regularily adding a buffer, it's dependant on this buffer, as far as self-sustaining goes somewhere between a failure, and experiment, ...
but,all that background and distraction aside, ...
IF the plants work at getting things back down, ... what kind of numbers would i consider to be on the right direction ?
as i'm sure, if the numbers are 400TDS, but stable there, some may consider that "well it's stable at least" but is that really taken care of itself, or just as low as the system can keep itself that it just can't reach lower levels
so i'm curious (and others are free & encouraged to add), ... what kinds of numbers should i be looking for ?
damn, i am going to need more test kits :(, oh well, for a good cause :)