Newby help please!!!

[Bruce Leyland-Jones]

Right.. I will list both tanks and what I have in them.
Tank 1 (original tank)
9 male guppies (2 came from new tank when I swapped them)
4 rummy nose tetras
7 neon tetras
1 oto cat
1 Yoyo loach
2 shrimp

Tank 2 (new tank)
5 female guppies
4 cardinal tetras
3 rosy tetras
2 kuhli loaches
1 molly

When I did the first water change of the tanks I put some water (about 5%) of water from the original tank in there aswell as the female guppies. Other then that nothing. I’m very careful with the water conditioner and always put what is directed to put in there. The temp is at 25 degrees celcius. Tank 1 is perfectly fine and I have no problems with any fish in that tank what so ever. It’s just tank 2 (new tank) that I’m having problems with. The last owners left a little water in there when I collected it (about 20%) but since then I’ve obviously refilled it once and then done a 70% water change yesterday before I did the test shown in the previous photo. Yeah I always wash my hands before tending to anything in the tank. The journey back was a little stressful and the previous owners left the fish in the tank when I collected it.

Okay...so the single sparkling gourami, (now deceased) was in the 'new' tank.
These can be delicate little fish, with their own quite specific needs.
What else came with the new tank and had that tank been properly looked after, with no deaths.
I believe your 'Molly' is a Platy.
The kuhli loach need to be in a much larger group and need lots of hiding places. They'll currently be stressed out of their tiny minds. In large groups, these are very sociable fish.
Likewise, as with the neons and cardinals, the 'Rosy'/Red-fin/Bloodfin tetra need to be in a larger group.

If any tetra is in a group smaller than it needs to be, they'll get quite aggressive with other fish and show this by nipping fins. Your guppies in particular will be vulnerable.

It's probably too late to prevent births, but you need to move that male guppy away from the ladies...like yesterday!
Your guppies will produce live young and your already way-too crowded tanks will get even more crowded.

The guppies at the top could be due to less oxygen in the water than would be desired...you can address this with airpump-driven airstones. That occasional bubble from the Treasure Chest would be no real use for this.
Your fish will also benefit from live plants.
Nothing too complicated or expensive...basic Elodea/pondweed would suffice, until you get better organised...just lobbed into the water. This will help manage the waste from your fish and provide much-needed security for them. As I've said earlier, plastic plants are okay-ish, but their relative hardness stops them being as safe to swim through and amongst as the real.

And please PLEASE do NOT add any more livestock to the tanks.

 

[Fishnewb21]

The bubbler chest is in tank 1 and I leave that open for a constant air flow. But I’ve removed that now and put a long bit on the end for lots of oxygen outlet. In tank 2 they only gave me a pump and heater no air stone or anything else. Il remove the male now. Shall I purchase a new air stone for tank 2 today? And plants?

 

[Fishnewb21]

Also should I do a water change now? Or when I get plants? I’m going to go and purchase them in the next hour

 

[Fishnewb21]

Shall I put my current air stone in the new tank for a moment while I go get a new one?

 

[Bruce Leyland-Jones]

The bubbler chest is in tank 1 and I leave that open for a constant air flow. But I’ve removed that now and put a long bit on the end for lots of oxygen outlet. In tank 2 they only gave me a pump and heater no air stone or anything else. Il remove the male now. Shall I purchase a new air stone for tank 2 today? And plants?

Also should I do a water change now? Or when I get plants? I’m going to go and purchase them in the next hour

Shall I put my current air stone in the new tank for a moment while I go get a new one?

Each tank should have an airstone for now. No point in taking one out of one tank to put in another tank.
Water changes are great, but only if they're necessary. Your test kit should tell you when necessary is...in other words, if you have ammonia or nitrites in the water.

Don't spend zillions on plants. You want fast growers, so avoid Java Fern and Java Moss for now. Also avoid any anubias and cryptocorynes. Feathery types are good.
TBH, unless you're wanted a nice planted tank, we're just in Rescue Mode at the moment, hence my suggestion of pondweed/Elodea.

 

[Fishnewb21]

They didn’t have much of a selection of plants so I got 2 of these and a moss ball are they ok? And an air stone

 

[Bruce Leyland-Jones]

They didn’t have much of a selection of plants so I got 2 of these and a moss ball are they ok? And an air stone

Yes.
Be careful not to crush the stems.
(What's the shop?)

 

[Fishnewb21]

Only one that was open near me was the ark

 

[CaptainBarnicles]

Those plants are perfect...you can float them if you don't want to plant them

 

[Bruce Leyland-Jones]

Only one that was open near me was the ark

Obviously, being Oop North, I know not of it.
Plus...what @CaptainBarnicles said.

 

[Fishnewb21]

Those plants are perfect...you can float them if you don't want to plant them

I will plant them as I planned on planting both of my tanks with all real plants anyway x Thankyou x

 

[CaptainBarnicles]

I will plant them as I planned on planting both of my tanks with all real plants anyway x Thankyou x

Awesome, when they grow tall and touch the surface, you can trim them anywhere you like and just replant the trimmings, they'll take root and ta-da...a new plant

 

[Fishnewb21]

Awesome, when they grow tall and touch the surface, you can trim them anywhere you like and just replant the trimmings, they'll take root and ta-da...a new plant

Aww brilliant Thankyou guys I will post photos once it’s all in. Let’s hope this is the end of my problems

 

[Fishnewb21]

Oh!! One more question!!! Plants are in little baskets with foam stuff.. do I just plant it like that?

 

[Bruce Leyland-Jones]

I will plant them as I planned on planting both of my tanks with all real plants anyway x Thankyou x

Okay...so spread out a tea towel and, once you've removed the plants from their pots and weights and whatever else is wrapped around their bases, you can separate them and plant them individually.
Ideally, you could use some of the material in the pot to protect the stems, whilst you wrap small weights around it. Weights are essential, but they help prevent the plants from leaving the substrate. The plants will still do their thing though.
When you trim them, use very sharp scissors...the sort used for beauty treatment are ideal. This is to avoid any crushing of the stems. Cut just above a leaf whorl.