What is Reddit's opinion of HM Digital unisex adult Pocket science lab ph meters, Brown, Without Digital Thermometer US?

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They are. A semi-permeable membrane filter with REALLY teeny tiny pores.

You can inexpensively and reliably test their filter condition with a simple durable tool. And at ~$0.30 a gallon it's rather inexpensive.

>TDS: ppm or µS/cm or something else? The deaths/overfeeding release more ions than just ammonia, and in small tanks that makes an notable impact on the TDS. I guess that‘s where it comes from.

ppm - we have this tester, which is pretty awesome to have around. :)

>The deaths/overfeeding release more ions than just ammonia, and in small tanks that makes an notable impact on the TDS. I guess that‘s where it comes from.

I'm guessing it's the deaths then, although I don't know why I'm still getting 1-2 die-offs every day or two still. I'm clearing the bodies immediately, water changing as it happens, etc - but it keeps going up.

>Do you have pictures?

Of the shrimp with the fuzz on their nose, or the dead ones? I went looking for fuzzy-nosed shrimp today and couldn't really find any, so I'm guessing that maybe it was just sand that got kicked up during the water change that might've fallen off maybe?

>Another guess would be that in the tank the substrate turned anaerobic, but never had enough resources to make problems, but that could have changed the moment the tank was overfeeded, so dies the tank shows signs of being to anaerobic, like having bad-smelling H₂S bubbles rising from the substrate or a foul smelling substrate?

I'm not seeing or smelling any - I am familiar with anaerobic conditions in tanks as I've got 15 cories between two other tanks and have to watch that stuff like a hawk. I stirred it up today to aerate it a bit and tried to siphon out some sand from the stirred layer in hopes that any extra bad food would be sucked up, but I do have to be careful because there are SO many shrimplets in there right now.

That's definitely possible, though, I guess. :(

"Science".

Here's a 20$ water tester. How subjectively you regard the empirical data it provides is up to you, however.

https://www.amazon.com/HM-Digital-Measurement-Resolution-Accuracy/dp/B0002T6L5M/ref=pd_sim_469_3?_encoding=UTF8&pd_rd_i=B0002T6L5M&pd_rd_r=QDKD6HAHDG6FWGA21H2G&pd_rd_w=dcyqo&pd_rd_wg=bYi0N&psc=1&refRID=QDKD6HAHDG6FWGA21H2G

I bought the following tds meter yesterday: https://www.amazon.com/gp/product/B0002T6L5M/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

It's $16.99 at the time of this post and has ATC so you can measure water at any temperature and get an accurate result.

I got a 115 reading of my tap water, although the average from this website shows 150.

I like this idea. How's this for the PPM meter, it says it has temperature correction so if you do a warm water and a cool water it won't be all weird: LINK

Man that's a bummer, I kept getting advice to up the nitrogen or to up the phosphorus. Would it be possible to just dilute the nutes further? I've actually been diluting them a bit anyways because of how small the container was and it had recently been watered.

I'll definitely look into getting a ph monitor soon. I'm also a broke college kid, so I've sunk about all the money I can spend for the next week or so already getting lights, a timer, bigger pot, and an extension cord.

Is there a specific monitor you would recommend? I know some aren't properly adjusted for temperature. I've got this one in my cart.

PPM is a measure of the total dissolved solids in the water. https://en.wikipedia.org/wiki/Total_dissolved_solids

They make cheap meters that can measure ppm or ec of the water. https://www.amazon.com/HM-Digital-TDS-4-Measurement-Resolution/dp/B0002T6L5M

Soft water tends to have a lower ppm and hard water tends to have a higher ppm. Reverse Osmosis filter water will have a ppm at or near 0. Generally for growing cannabis you want a lower ppm.

This is the one I'm using. https://www.amazon.com/gp/product/B0002T6L5M/ref=ppx_yo_dt_b_asin_title_o00__o00_s00?ie=UTF8&psc=1

I use HM Digital TDS and PH meters.

i have no idea. tds meters are really cheap though https://www.amazon.com/HM-Digital-Measurement-Resolution-Accuracy/dp/B0002T6L5M

1. You can get a digital TDS (total dissolved solids) meter or the API GH/KH liquid test kit. From my understanding, dH (German degree of hardness) is not a specific measurement but rather a conversion to/from ppm (1 dH = 17.5mg/L or ppm).

2. Snails (even the pest/pond/bladder variety) are generally a good thing. A sudden bloom of snails probably indicates overfeeding, as your snail population directly reflects the amount of food available for them to eat. Less food = less snails. Feeding less and cleaning more should decrease the population, but you might want to keep the ones you have to clean up what's already available in the tank. Afterwards, their population will regulate itself.

you can buy a cheap tester like this one to test the water before and after...

this is what I use: http://www.amazon.com/HM-Digital-TDS-4-Dissolved-Solids/dp/B0002T6L5M

I keep my CRS in 6.2 ph, and TDS about 170 when it gets close to 200 I do a water change with pure R/O water (1-5 TDS water) to bring it back down to ~170